For high efficient silicon thin-film solar cells an effective light trapping and low reflectivity over the entire sun spectrum are necessary. Light trapping structures based on silicon substrate have been intensively investigated with numerous studies in the last years. This paper reviews the present status of light trapping structures on substrate. The influence factors are analyzed and possible developments in this field are prospected.

Studies on catalytic actions of noble metal nanoparticles are hot off the press in current fields of advanced materials and energy science. Recently, etchings of silicon substrates using noble metal particles as assisted catalysts to fabricate antireflective layers for solar cells have been intensively studied. This paper reviews the present status of antireflective layers on substrate using noble metal particles as catalysts. The reaction mechanism and influence factors are analyzed and possible developments in the field of thin-film solar cells are prospected.

Highly ordered TiO2 nanotube arrays were fabricated via electrochemical anodization of pure Titanium Foil. The morphology, crystal structure of the TiO2 samples were characterized by SEM, XRD. The photovoltaic performances of TiO2 nanotube arrays were sensitized with ruthenium-based dye N719 were evaluated by means of the Linear Sweep voltammetry measurement. The results showed that the pore-size and length of TiO2 nanotube arrays increased with the increases of anodization voltage and time. At the same time, the samples calcined at 450 ℃ have a perfect anatase phase crystal structure and showed the highest light conversion efficiency was 2.1%.

Abstract: Dense TiO2 films were prepared on conducting glass substrates by electron beam evaporation, and annealed in O2 atmosphere at different temperatures. In order to prevent the charge recombination at the interface of conducting glass substrate/electrolyte ( ), the film was used as a blocking layer in dye-sensitized solar cell. The structure and composition were characterized by XRD and XPS，respectively. The influence of different thickness blocking layers on the photovoltaic properties of DSSC was investigated. The results reveal that the introduction of blocking layer effectively prevents the charge-transfer reaction and enhances the open voltage, short current, FF and photoelectric conversion efficiency. The photoelectric conversion efficiency is higher than that of without blocking layer by 31.5％.

The ultraviolet irradiation method was used to graft methyl acrylate (MA) to Li-ion battery separator. It was found that the degree of grafting (DG) was influenced by initiator concentration, monomer concentration and irradiation time. The MA-graft-separator was analyzed by FT-IR、SEM and contact angle testing. With BP concentration of 0.02g/ml, pure MA monomer solution and irradiation time of 90s, DG was 68.9%, and the wetting ability improved obviously with the contact angle reduced to 12°from 46°.

This paper mainly investigated the optimum thickness of TiO2 nanocrystalline film prepared by screen-printing, the effects of large-particle scattering layer and TiCL4 treatment on the characteristic of dye-sensitized solar cell (DSSC). The results indicate that the adding of large-particle scattering layer and the treatment with TiCL4 can improve the photovoltaic performance of DSSC.

Pt concentration have significant impact for the property of platinized counter electrode and the performance of the dye-sensitized solar cell (DSSC)，especially when illuminate the cell through the counter electrode(CE).In this research,DSSCs were based on CEs with Pt films of different concentration, the effects of the concentration of Pt film on impedence,light harvest when illuminate the cell through the CE were investigated. The result showed that 10mmol / L was the best Pt concentration illuminated through the CE, in a certain concentration range, open circuit voltage and energy conversion efficiencies at first increased and then decreased with the increase in the Pt concentration,at the same time short-circuit current decreased.

TiO2 nanowires powder were synthesized by hydrothermal method. Tetrabutyl titanate sol was prepared from sol-gel process. Gel slurry was formated by Tetrabutyl titanate sol mixing with TiO2 nanowires powder. The composites photoanode of TiO2 nanoparticles and TiO2 nanowires were prepared on transparent conductive fluorine-doped tin oxide (FTO) substrates by dip-coating method. The structure and morphology characteristics of TiO2 nanowires powder and composites photoanode have been analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM). The effect of the relative nanowire/nanoparticle ratio on the performance of solar cells were systematically investigated by I-V curves and electrochemical impedance spectroscope. The results shows that the short-circuit current density and light-to-electricity efficiency of DSSCs obviously increas, open-circuit voltage and fill factor basically maintain constant, the impedance of electron transfer decrease, electron lifetime in the photoanode lengthen, with increasing of TiO2 nanowires in composites photoanode.

To obtain a photosensitizer for photovoltaic application, a Ru-complex (Ru-[bpy(COOEt)2]2Cl2), was synthesized and characterized by 1H NMR, MS, FT-IR, UV-Vis and element analysis. Ru-[bpy(COOEt)2]2Cl2 in DMF exhibited strong absorptions in the region of 350-800 nm and its energy levels for the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) levels were estimated from cyclic voltammetry as -5.07 and -3.16 eV, respectively. TG indicated that Ru-[bpy(COOEt)2]2Cl2 has good themal stability under 300 oC. A photovoltaic device was prepared by spin-coating thin films from a solution containing Ru-[bpy(COOEt)2]2Cl2, PCBM and PVK (1:1:1) (w/w/w) on an ITO (indium-tin oxide) glass using aluminum as a top electrode. Photovoltaic behavior of the device was investigated under a 55 mW cm-2 white arc lamp illumination showed a typical rectifying behavior as observed through current density-voltage (J-V) characteristic measurement. The Voc, Isc and power conversion efficiency could be improved by inserting a modification layer of PEDOT:PSS.

With the commercialization of dye sensitized solar cell (DSSC), the investigation of large panel DSSC has attracted much attention. DSSC panel with size up to 100 mm × 75 mm in parallel was fabricated by screen print method. The influence of DSSC size on the performance was investigated, and the photoelectrical property of large panel DSSC was studied. The results indicate that the fill factor decrease with increasing DSSC size. By using parallel connection the fill factor of large panel DSSC was dramatically improved compared with small size DSSC, and the fill factor of 0.63 was obtained.

A series of sulfur composite materials which used acetylene black, aphanitic graphite，Cabot Vulcan XC-72 carbon black and Cabot Bp2000 Super conductive carbon black were prepared. The physical structures were determined by X-ray diffraction，scanning electron microscopy and specific surface area measurements. The electrochemical performances of the sulfur composite material were characterized by cycling test.The results indicate that: factors such as surface morphology, pore size distribution and specific surface area of the matrix materials can affect the electrochemical performance of the composite materials.In this paper,the best matrix material is Bp2000 super conductive carbon. Its initial discharge specific capacity is 1385.1mAh/g. The specific capacity still keep as high as1080.2mAh/g, after 30 cycles at room temperature just 22% fade.

In this work, we adopt the simple vapor transmission deposition (VTD) to prepare ZnO nanotetrapods and nanorod in case of no catalyst. The nano ZnO were characterized by powder X-ray diffaction (XRD), scanning electron microscope (SEM). X-ray diffraction (XRD) suggests a hexagonal ZnO phase. SEM shows that ZnO tetrapods have a core at the center with four arms of about 70 nm and arm lengths up to 300 nm, growing out from the core along four directions. The arm diameter of ZnO nanorods is about 84 nm. We introduce a photoanode architecture used Scraper method in dye sensitized solar cell comprising thick film of nano ZnO. More important, we measured the photoelectric performance of these photoanodes, a power conversion efficiency of ZnO tetrapods dye sensitized solar cells up to 1.88% (under 100mW/cm2) is far higher than ZnO nanorods dye sensitized Solar cells up to 0.7%.

The LiFePO4/C composite and LiNi1/3Co1/3Mn1/3O2 are synthesized by rheological phase assisted with carbon thermal reduction method and carbonate co-precipitation method respectively. Then the two materials are fully blended by powerful stirring, and the effect of blending ratio on the electrochemical performance of the blended material are studied via galvanostatic charge/discharge measurement and electrochemical impedance spectroscopy (EIS) at room temperature. The results showed that the electrochemical performances (include rate performance, stability performance, higher discharge and higher specific energy) of the mixed electrode are improved effectively due to the synergy effect between LiFePO4 and LiNi1/3Co1/3Mn1/3O2 after blending.

Recently, nickel oxide (NiO_x) has been using as a promissing hole transport layer (HTL) in perovskite solar cells (PSCs), due to its low cost, high hole mobility, good chemical stability and low- temperature processability. And the trans perovskite solar cells prepared by NiO_x HTL are showing great market application prospects. The preparation and optimization of NiO_x HTL are critical to the performance of the photovoltaic devices. Therefore, in this paper, the preparation process and research progress of NiO_x thin films in PSCs are systematically introduced. Then the effects of post-treatment methods such as O₂-plasma, ultraviolet, and surface passivation on the defect state, surface chemical state and material work function of NiO_x thin films are emphatically analyzed. The progress of doping (like transition metal, alkali metal, rare earth element doping and element co-doping) on the optical and electrical properties of NiO_x thin films and the optoelectronic properties of devices are summarized in detail. Furthermore, the future development directions of NiO_x-based PSCs are prospected.

Perfluorosulfonated acid (PFSA) ion exchange membranes, with different ion exchange capacities (IECs), were prepared by a solution-casting method for vanadium redox flow battery applications. Water uptake, proton conductivity, vanadium ion permeability and selectivity of the PFSA ion exchange membranes were investigated. It is found that membranes with higher IEC values have relatively lower vanadium ion permeability and higher proton conductivity. The highest selectivity of the membranes being characterized was achieved from the PSFA ion exchange membrane with 1.10 mmol/g, which was 2.97 times higher than that of Nafion 117 membrane.

In this paper, Mesoporous TiO2 microspheres with high surface areas were prepared by hydrothermal method using titanium sulfate as raw materials in the presence of urea, and were characterized by XRD, FESEM and surface area analyzer. The effect of the added amount of urea on the particle size, surface area and pore size of the mesoporous TiO2 microspheres were investigated. The as-synthesized mesoporous TiO2 microspheres were then used to prepare the TiO2 photoelectrode of the Dye-Sensitized Solar Cells (DSSCs) by a doctor-blade method. The results indicate that the cell assembled with the TiO2 photoelectrodes fabricated with the mesoporous TiO2 microspheres synthesized with 1.2 g urea shows the light-to-electric energy conversion efficiency of 6.2% under illumination of simulated AM 1.5G solar light (100 mW/cm2), which is much higher compared with a commercial Degussa P25 TiO2 nanocrystals photoelectrode (4.24%).

Carbon encapsulated hollow Fe3O4 nanoparticles have been successfully synthesized via co-carbonization and oxidation in the air. The morphologies and structural features of the sample were investigated by X-ray diffraction(XRD)、transmission electron microscope (TEM) and high-resolution TEM (HRTEM). The electrochemical performance testing showed that the first reversible specific capacity of the carbon encapsulated hollow Fe3O4 nanoparticles was as high as 1294.7mAh/g at a current density of 0.2 mA cm?2. After 30 cycles the reversible specific capacity was still maintained at 392.1 mAh/g. Even at a high current density of 1mA cm?2, the first reversible specific capacity was 216.3mAh/g and remained at 113mAh/g after 30 cycles.

The electrochemical properries of AZ21 alloy and AZ31 alloy as anode materials for magnesium - manganese dry batteries were studied by weight lose、linear sweep voltammetry and discharge measurement of coin-type cells，and the affects of Li2CrO4 as inhibiter also were studied. The results show that：the corrosion rate and the open-circuit potentials of AZ21 alloy in Mg(ClO4)2 solution are higher than AZ31 alloy. The battery’s capacity and positibe utilization when AZ21 alloy as anode material are lower than AZ31 alloy. The corrosion rates of AZ21 and AZ31alloys were reduced greatly with a little Li2CrO4, and the inhibiton efficiency was increased with the addition of Li2CrO4，but it was reduced when the concentration over 0.3 wt.%. The Li2CrO4 also can improve the working voltage、battery capacity and positive utilization.

The Si/Graphite/Carbon composites were prepared through wet milling technique followed by pyrolysis method in this work. The phase structures, electrochemical performances and kinetics of the as-prepared composites were analyzed respectively. The effect of different components ratio on cycling performance was investigated specially. The results showed that the composites consisted of 20 wt.% Si and 30 wt.% graphite exhibited the best overall performances, in which the first reversible capacity was up to 865 mAh g-1 with coulomb efficiency of 69%, and the capacity retention after 30 cycles was 88%.

This paper study of the VC content effects on battery’s cycling performance under high temperature and its consumption procedure, Result is that batteries perform the best 60℃ cycling performance when VC contents is 3%wt . EIS shows that the resistance of the anode’s solid electrolyte interface（SEI）accrescents as the VC content increases and rises to the top when it reaches 3%. It also discoveries that VC will always be used up after certain cycle number no matter how much VC electrolyte contents. This indicates that VC has effect on the repair of SEI in former time not latter one. But the life cycle curve does not appear sudden drop, it indicates that the effects VC made on battery mainly forms before the forming process, once the SEI has formed , VC will do little benefit.

Solid oxide fuel cell (SOFC) is a kind of all solid-state power generation equipment with high energy conversion efficiency, friendly environment and flexible fuel, which provides a choice for the sustainable development of energy resources. Oxygen ions are conducted through oxygen vacancies in solid electrolyte. Increasing the concentration of oxygen vacancy is the key to improve the ionic conductivity, and electrolyte materials with high ionic conductivity promote the development of SOFC. In this paper, the ion transport mechanism of solid electrolyte and the structure, research progress, advantages and disadvantages of ZrO₂ based electrolyte, CeO₂ based electrolyte, Bi₂O₃ based electrolyte and LaGaO₃ based electrolyte materials are reviewed. The development trend of electrolyte materials in the future is prospected.

Cu2ZnSnS4 (CZTS) film was prepared by sulfurization of Zn/Sn/Cu multilayer. CZTS film’s characterization was carried out by X-ray diffraction、Raman spectrum、UV-Vi-Nir spectrophotometer、Scan electron microscope、Energy dispersive spectroscopy and Digital source meter. The results show that no any other phases were observed and the Raman peaks observed are in accord with the standard Raman perks of kesterite CZTS. The light absorption coefficient of the film is higher than 104cm-1 and its optical band gap was estimated to be about 1.5eV. The surface of CZTS film is compact and uniform and the element ratio is close to the stoichiometric value. Obvious photo current response property of film was observed, and the photo current excitation time and decay time are 0.0736s and 0.2646s, respectively.

Abstract: Poly(3-hexylthiophene)(P3HT) is a novel material for application in organic photovoltaic solar cell donor. By using vacuum evaporation and spin coating, a novel organic photovoltaic cell based on P3HT with a structure of ITO/Buffer layer/P3HT/C60/Bphen/Ag was fabricated, and was analyzed by the semiconductor test instrument for the characteristics parameters of solar cells. The optimal thicknesses for P3HT and C60 are 30nm and 40nm, respectively. It was also demonstrated that the open-circuit voltage of the device is significantly enhanced when molybdenum trioxide (MoO3) is used as the anode buffer layer. Therefore, by optimizing the preparation process and introduction of new metal oxides, the parameters of solar cells could be better controlled.

The precursor of Mn hybrid material was synthesized by a modified Hummers method and MnOx/graphene composites were obtained through a reduction in nitrogen and hydrogen atmosphere at 400℃. The composite material was investigated as anode materials for lithium ion batteries via scanning and transmission electron microscopy (TEM), X-ray diffraction (XRD) and a variety of electrochemical testing techniques. Experimental results showed that nano-particles of manganese oxide were well dispersed on the surface of graphene sheets. The first reversible capacity of the prepared composite was as high as 876mAh/g at current density of 50mA/g. After 30 cycles, the reversible specific capacity was still maintain at more than 700mAh/g.

Cathode material is an important component of solid oxide fuel cell. Improving the electron/ion conductivity of cathode materials and reducing the polarization resistance are important methods to make SOFC operate at low temperature and increase the service life of battery. The high electronic conductivity of cathode materials makes perovskite oxides occupy a dominant position in the research field of cathode materials. In this paper, the research progress of perovskite structure cathode, spinel structure cathode and Ruddlesden-popper structure cathode materials is reviewed, and the development direction of cathode materials in the future is prospected.

Lithium ion conducting membranes based on porous separators are the key materials for high performance lithium ion batteries. In this paper, the amphiphilic copolymers of poly(methyl methacrylate-co-dimethylaminoethyl methacrylate) (P(MMA-co-DMAEMA)) were synthesized through a conventional radical polymerization. Using these copolymers as additives in casting solutions, the PVDF/P(MMA-co-DMAEMA) porous blend membranes were prepared following a typical non-solvent induced phase separation (NIPS) process. Compared with pure PVDF separator with comparable porous structure, the adoption of P(MMA-co-DMAEMA) could not only decrease the crystallinity, but also enhance the stability of entrapped liquid electrolyte. Such modi?ed PVDF membrane should be named as “active separator”, which can exhibit the charactreristic of gel electrolyte by absorbing lithium salt liquid electrolyte. For separators with PVDF/P(MMA-co-DMAEMA) mass ratio in 10/1, the liquid electrolyte uptake reached above 420wt% and ion conductivity of the membrane was 1.8 × 10?3 S/cm, which was acceptable for high voltage lithium ion batteries. These results primarily indicate the potential of the prepared blend separator in real application in safe and high performance lithium ion batteries.

TiO2 films, TiO2-ZnO composite films and TiO2/ZnO double films as photoanode of dye-sensitized solar cell were prepared by screen-printing technique, and the modulation effect of ZnO on the TiO2 photoanode was studied. The results of the study indicate that conversion efficiency of the solar cell with TiO2-ZnO composite films photoanode prepared with Zinc acetate doped is higher than that of with no doped by 1 times, and because of the um magnitude of the large size of ZnO, its composite photoanode make the conversion efficiency of the solar cell decrease. The conversion efficiency of the solar cell with TiO2/ZnO double films photoanode prepared from Zinc acetate as raw material is higher than that of without ZnO film layer by 13 times.

Proton-conductive composite electrolytes consisting of xNH4PO3-SiO2(x=1,2,4) was synthesized by a sol-gel method. X-ray diffraction investigation showed that NH4PO3 was chemically stable in the process of sol-gel preparation. The conductivity of the resulted composites was measured with impedance spectroscopy. The conductive behavior was improved by increasing the molar ratio of NH4PO3. Meanwhile the activation energy for conductivity decreased with NH4PO3 content. This indicates that NH4PO3 is responsible for the high conductivity and SiO2 serves as a supporting matrix. The proton conductivity was dramatically enhanced by increasing the water content, indicating that the effect of water is significant. Maximum power density was 4.8mW.cm-2 at 250℃ when humidified hydrogen and oxygen were used as the fuel and oxidant.

In order to study the feasibility of magnesium chloride hexahvgrate(MgCl2?6H2O) as a PCM under medium temperature, six hundred accelerated thermal cycle tests had been conducted under sealed and unsealed conditions. The melting temperature and the latent heat of fusion, crystalline structure and degree of supercooling were determined by differential scaning calorimetry(DSC), X-ray diffraction(XRD) and multiway temperature detector respectively. The results indicated that the decrease in latent heat of fusion of MgCl2?6H2O under unsealed conditon was 54.2% and accompanied with a new phase MgCl2?4H2O after 200 cycles. The change in melting temperature, peak temperature of MgCl2?6H2O under sealed condition was ±1% and ±4% respectively, and the change in latent heat of fusion was and -15.2%~+1.5% except for the 300th melt/freeze cycle. MgCl2?6H2O solidified with a slight degree of supercooling in the range 0~2.2℃. It is indicated that MgCl2?6H2O under sealed conditon is a promising phase change material for solar energy use under medium temperature.

SiO₂ is considered to be a promising green lithium-ion anode material due to its high theoretical specific capacity (1965 mAh/g), good cycle stability, high abundance and low cost. In fact, when SiO₂ is used as the negative electrode material of a lithium battery, because of the large bond energy between Si-O, it is inert to Li⁺ and does not exhibit good electrochemical performance. However, by surface modification or construction of 3D nanostructures, it exhibits activity against lithium. In order to further understand this anode material, this article reviews the lithiation reaction mechanism of SiO₂ as a lithium-ion anode material, and discusses its electrochemical performance from the aspects of size, structure, composite with metal oxides and surface modification. Finally, the challenges and prospects of SiO₂ as a negative electrode material are proposed.

Black Phosphorus has a unique two-dimensional layered folded structure, with unique advantages such as large theoretical capacity, high carrier mobility, low redox potential, anisotropic structure, and adjustable band gap. It has broad application prospects in the fields of energy storage, photocatalytic hydrogen production, and cancer targeted therapy. Especially in the field of electrochemical energy storage, because of its high theoretical specific capacity of 2 596 mAh/g, it has been widely used as anode material for lithium-ion batteries and sodium-ion batteries, and it is an ideal anode material for rechargeable batteries. A comprehensive understanding of the progress in the application of black phosphorus in the field of ion batteries, aiming to lay the foundation for the subsequent structural design of black phosphorus and pave the way for the vigorous development of the energy storage field.

In this paper, a method for preparing a low reflectivity nano-light trapping structure of solar cell was proposed. We used graphite nanoparticles (GNPs) as a mask, afterwards，the metal assisted etching method was used to prepare the nano-light trapping structure. By this method, a nano-light trapping structure of solar cell was obtained, which is covered with nanowires and nanoholes. According to the metal-assisted etching mechanism and the formation principle of this light trapping structure, the influences on different morphologies of the light trapping structure prepared under different GNPs and H2O2 concentrations were analyzed. And the morphology’s impacts of the light trapping structure on antireflection were discussed. Finally, only 3.6% reflectance of the light trapping layer in the range of 300-1100 nm was obtained.

The research progress and problems of photo-anode of dye-sensitized solar cells (DSSC) are reviewed in this paper, the methods to improve the performance of DSSC are summarized, and also its prospective development direction is put forward.

Three-dimensional LiFePO4/graphene nanostructures for lithium-ion batteries were successfully prepared by a sol-gel Sintering method. The synthesized material was characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM), Transmission Electron Microscope (TEM) and a variety of electrochemical testing techniques. There were graphene sheets on the surface and among LiFePO4 Micro-nano-particles of LiFePO4/graphene composites, which indicates the Graphene and LiFePO4 of composites had be already nicely blended together. A three-dimensional conducting network of LiFePO4/graphene composites was formed by graphene sheets, which greatly enhance the electronic conductivity and reduced charge transfer resistance, thereby realizing the full potential of the active materials. The electrochemical testing indicated that the electrochemical properties of LiFePO4/graphene was better than that of LiFePO4/C. LiFePO4/graphene composite exhibited high specific capacity and superior rate performance with the discharge capacities of 163.81 mAh?g-1 at 0.1 C and 101.57 mAh?g-1 at 5 C, whereas a dis-charge capacity of LiFePO4/C is only 146.05 mAh?g-1 and 54.67 mAh?g-1 respective-ly. LiFePO4/graphene also showed an excellent cycling stability with only about 98.48% capacity retention at 0.5C rate after 100 cycles.

With the development of portable electronic devices, the demands for energy density and safety of their core components, i.e. lithium ions batteries (LIBs), are becoming much stricter. Since the solid-state battery can avoid the use of combustible organic liquid electrolytes and separators of flammable polyolefin, they show excellent advantages in energy density and safety, which are considered as the next-generation of LIBs. The core technology of solid-state batteries is to develop novel electrolytes with higher ionic conductivity, non-flammability, considerable mechanical properties, flexibility and environmental friendliness. As one of the best electrolytes of solid-state batteries, PEO-based polymers show strong competitiveness. Therefore, in this work, the progress associating to PEO-based polymer electrolytes was summarized and their prospects were presented.

High-nickel ternary cathode materials have received extensive attention from researchers due to their advantages, including high energy density, high voltage plateau, and non-memory effect. However, limited by its deficiencies such as poor cycling stability, cations disordering, and poor thermal stability, there remains necessity for extensive and comprehensive research on high-nickel ternary cathodes. This paper focuses on the deficiencies of high nickel ternary cathode materials, and summarized recent advances in modification approaches, encompassing ions doping, surface coating, concentration gradient, co-modification, electrolyte modification and structure regulation in recent years, while also discussing and providing prospects for future research directions.

Aluminum-plastic film of 40 μm tape casting polypropylene (1^# sample), 80μm tape casting polypropylene (2^# sample) and 80 μm grafted modified polypropylene (3^# sample) were selected as the research objects. Three kinds of soft-coated lithium ion battery aluminium-plastic film were reserached under different heat-sealing temperature, time, pressure, thickness and types of heat-sealing layer. The heat sealing strength and bonding interface of three different aluminium-plastic films were analyzed by universal testing machine and scanning electron microscope. The results showed that the optimum heat sealing process for three different aluminium-plastic films was the heat sealing temperature of 230 ℃, the heat sealing time of 12 s and the heat sealing pressure of 1.0 MPa. The highest heat sealing strength of 1^# sample was 98.9 N/15 mm; that of 3^# sample was 114.3 N/15 mm; and that of 2^# sample was 144.4 N/15 mm. In the range of 0.5-1.0 MPa, the effect of heat sealing pressure on the heat sealing strength of the aluminium-plastic film wasn’t significant. The heat sealing temperature and time were the main factors affecting the heat sealing strength of the sample. Under the same heat sealing conditions, the heat sealing effect of CPP heat sealing layer was better than that of PP-g-PGMA heat sealing layer. The research on the interface of hot-seal peeling failure showed that the failure modes of peeling experiment were interfacial failure and peeling failure. The interface between CPP and aluminium foil wasn't closely mechanically meshed. If the aluminium foil is surface treated and the mechanical bonding force between aluminium foil and CPP is increased, it may become one of the effective means to improve the heat-seal strength of aluminium-plastic film.

The efficiency of the quantum dot sensitized solar cell have broken through 5% up to now. But there is a big distance between the efficiency of quantum dot sensitized solar cell with that of the dye sensitized solar cell which is 12%. Five points which are charge recombation, light harvesting, structure of photoanode, electrolyte and counter electrode were put forward as the reason for the low efficiency of the quantum dot sensitized solar cell. Meanwhile the solution to them by researchers in the field of quantum dot sensitized solar cell was also introduced.

Organic-inorganic hybrid perovskite solar cells (PSCs) have rapidly emerged following the silicon-based solar cell. At present, photoelectric conversion efficiency (PCE) of PSCs has reached 25.5%, which is considered to be the promising new type solar cell. The top electrode is an important part of PSCs .This paper mainly expounds the research progress of top electrode materials for PSCs, and summarizes the interface regulation and modification treatment of metal electrode and carbon electrode. The advantages and challenges of metal and carbon for top elelctrode and the application of the top electrode materials in low manufacturing cost and long-term stability of perovskite solar cells were proposed.

Porous SnO2 nanospheres have been successfully synthesized by a simple hydrothermal method without using any template and surfactant. These porous SnO2 nanospheres were orderly assembled by small nanoparticles. The morphology and structure of the products were systematically studied by means of XRD, SEM, TEM, and SAED. The electrochemical performance of the products were also investigated in detail.