由电泳沉积ZIF-67薄膜制备高效染料敏化太阳能电池对电极

为了提高碳化ZIF-67薄膜制备的染料敏化太阳能对电极的光电性能,本研究通过碳化电泳沉积ZIF-67薄膜得到多孔碳电极,并进一步在多孔碳电极热分解氯铂酸得到负载铂的多孔碳复合电极。通过光电流-电压曲线、电化学阻抗谱和强度调制光电流谱等的测试,对比单独在FTO导电玻璃基底热分解氯铂酸得到的铂电极和单独碳化电泳沉积ZIF-67薄膜得到的多孔碳电极,研究了负载铂的多孔碳复合电极作为染料敏化太阳能电池对电极的光电性能。与其它两种对电极相比,以负载铂的多孔碳复合电极为对电极的染料敏化太阳能电池光电转换效率最高,因碳化ZIF-67薄膜的多孔电极具有较大的比表面积,能负载足够量的铂,从而提供更多的催化位点,具有更好的催化性能,从而使染料敏化太阳能电池的光电转换效率得到显著提升。     

TiO2双层薄膜电极与背反射共构DSSC制备及表征

提出并设计制备了一种新型的染料敏化太阳能电池(DSSC)的结构.该结构是在DSSC的光阳极上通过丝网印刷技术制备由尺寸不同的纳晶粒子构成的双层纳米晶TiO2薄膜,并在DSSC对电极的背面置放一层镀银反光膜.采用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线电子衍射仪(XRD)等手段分析了双层纳米晶TiO2薄膜的结构和形貌.通过实验,获得了双层纳米晶TiO2薄膜的最佳膜厚,分析了镀银反光膜的反光率.研究结果表明:在AM15、光强100mW/cm2的模拟太阳光下测试,这种新型结构的开路电压、短路电流、填充因子分别为075V,1117mA/cm2和0523;光电转换效率达到438%,比相同条件下传统的三明治型结构提高了241%.     

固态染料敏化二氧化钛纳晶薄膜太阳能电池的研究进展

固态染料敏化太阳能电池是目前能源研究的热点领域之一。我们设计并合成了一系列含有不同特性基团(如柔软的高分子链、可现场固化基团和高电导的离子液体基团)的高分子固态电解液应用于染料敏化太阳能电池;同时,结合理论模拟计算得出的二氧化钛纳晶薄膜工作电极和对电极的光散射效应与光限域效应能提高电池的光吸收效率,二氧化钛纳晶薄膜孔隙率的增大能增加固态电解液在膜内的渗透和扩散,对工作电极和对电极进行结构优化可得到高光电转换效率的固态染料敏化太阳能电池。     

染料敏化太阳能电池电解质的还原电位对开路电压的影响

研究了不同溶剂和不同对电极对I3-的还原电位和染料敏化太阳能电池的开路电压的影响。在I3-/I-的离子浓度和染料敏化TiO2膜性能相同的情况下,能使I3-在较高的电位下就能还原的对电极溶剂有较高的开路电压。相对于Pt对电极,用石墨作对电极时有较高的开路电压,这是由于小电流时I3-/I-在石墨表面的还原反应过电位要比在Pt表面小。     

Preparation of photoanode and its application to flexible dye-sensitized solar cells

A TiO2 slurry was prepared by hydrothermal treating mixture of commercial TiO2 (P25),ethanol and distilled water in an autoclave.A flexible photoanode and dye-sensitized solar cell (DSSC) was fabricated on an ITO-coated poly (ethylene naphthalate) sheet (ITO/PEN) substrate by a doctor-blade technique.The sample was characterized with SEM,UV-vis,FTIR,and the photoelectric properties of the DSSC were measured.The influence of preparation conditions on the properties of the flexible DSSC was investigated.It is...     

High conversion efficiency of pristine TiO<Subscript>2</Subscript> nanotube arrays based dye-sensitized solar cells

We prepared highly-ordered titanium dioxide nanotube arrays (TNAs) by anodizing Ti foils in F-containing electrolytes.The crystalline nature and morphology of the TNAs were studied using X-ray diffraction patterns and scanning electron microscopy.We found the morphology of TNAs affects the light-to-electricity conversion efficiency (η) of dye-sensitized solar cells (DSSCs).The efficiency of DSSCs reached 5.95% under the condition of light illuminated from the counter electrode.The high efficiency of TNA-based DSSCs was attributed to the neat top surface of TNAs,which allows more dye molecule loading on the surface of the TiO 2 nanotubes,and fewer electron recombination centers and a low interface resistance of integrated TNAs.     

加工有机晶体管电极的压力选择性剥离方法

提出一种简单有效的图案化有机场效应晶体管中聚乙撑二氧噻吩和聚磺化苯乙烯(PEDOT:PSS)聚合物电极的方法,运用带有凸纹图案的环氧树脂模板选择性的剥离涂敷在基底的PEDOT:PSS 薄膜形成图形.结果表明,环氧树脂模板与聚合物间的高黏附功可使薄膜易于发生选择性剥离,从而使其快速大面积的图案化.     

无电解沉积用于太阳能电池(英文)

研究分为两部分讨论:(1)是利用无电镀与自组装单分子层表面改质技术制备用于染料敏化太阳能电池上具有催化性的铂对电极;(2)是利用无电镀与微米压印法技术制备硅单晶太阳能电池的电极.适当的表面改质技术(Self-assembled monolayers,SAMs)成功地开发出一低温湿式制程,可制备出具有高度选择性的铂对电极用于透明导电玻璃面上.通过原子力显微镜分析,发现3-(2-Aminoethylamino)propylmethyl-dimethoxysilane(Me-EDA-Si)可成功的改质于透明导电玻璃上,同时利用高解析电子能谱仪来分析每一步骤的改质,证明钯触媒可成功的接于导电玻璃上以催化铂无电镀反应的进行,因而发现经无电镀沉积的薄膜呈现粗糙的表面而提高了铂触媒的活性表面积.因此利用无电镀所制备的铂对电极所组装而成的染料敏化太阳能电池具有较利用溅镀法所制备的铂对电极所组成之电池有较高的效率.为开发制备双层结构(无电镀Ni3P/电镀铜)的电极于硅单晶太阳能电池上作为收集太阳能电池所产生的电子.结合了无电镀与微米压印法来制备无电镀镍金属为导电层以取代传统的银浆.其优点在于利用无电镀镍作为导电层可降低与硅基材之间的接触电阻(NiP为10-4Ω.cm2,银为10-3Ω.cm2),更可大幅的降低线宽(小于40μm).另微米压印法不只能提升电池之效率更可提高模块之功率.在无抗反射层的相同条件下,利用无电镀与微米压印法所制备之电池其效率可高于传统利用银浆所制备之太阳能电池约1%左右的效率.     

Luminescent and photovoltaic properties of poly（9,9-dioctylfluorene- co-bithiophene） in organic electronic devices

We studied the luminescent and photovoltaic properties of poly(9,9-dioctylfluorene-co-bithiophene)(F8T2) based on ITO/PEDOT:PSS/F8T2/Bphen/LiF(0 or 1 nm)/Al and ITO/PEDOT:PSS/F8T2:PCBM/Bphen/Al.A stable and bright yellow emission was obtained from polymer F8T2,and the electroluminescence power reached 45 ?W at a 15 V driving voltage.Polymer F8T2 shows a broad absorption band from 400 to 500 nm,and has a shorter absorption edge at about 560 nm compared to that of the typical electron donor P3HT(650 nm).The photoluminescence quenching of F8T2 occurs with only a small fraction of blended PCBM due to the effective exciton dissociation at the interface between F8T2 and PCBM.Polymer solar cells(PSCs) using F8T2:PCBM as the active layer show a low power conversion efficiency(PCE) of 0.10% with an open circuit voltage(Voc) of 0.91 V and short circuit current density(Jsc) of 0.23 mA/cm2.The PSCs using F8T2:P3HT:PCBM as the active layer have a Voc of 0.85 V and Jsc of 3.02 mA/cm2,improving the PCE by about 0.90%.We attribute the improved cell performance to the higher number of photons harvested by P3HT molecules.     

Flexible dye-sensitized solar cell based on PCBM/P3HT heterojunction

Using blend heterojunction consisting of C60 derivatives [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) and poly(3-hexylthiophene) (P3HT) as charge carrier transferring medium to replace I3–/I– redox electrolyte,a novel flexible dye-sensitized solar cell (DSSC) is fabricated.The characterization of infrared spectra and ultraviolet-visible spectra shows that the PCBM/P3HT heterojunction has not only the absorption in ultraviolet light for PCBM,but also the absorption in visible and near infrared light for P3HT,which widens the photoelectric response range for DSSC.The influence of PCBM/P3HT mass ratio on the performance of the solar cell is discussed.Under 100 mW cm–2 (AM 1.5) simulated solar irradiation,the flexible solar cell achieves a lightto-electric energy conversion efficiency of 1.43%,open circuit voltage of 0.87 V,short circuit current density of 3.0 mA cm–2 and fill factor of 0.54.     

Electrochemical characterization of the Pt /PEDOT electrode in DMFC

Poly-(3, 4-ethylenedioxythiophene) (PEDOT) was applied in making electrodes and gas diffusion layer for direct methanol fuel cells (DMFC). Electrochemical characterizations of Pt/PEDOT electrodes, made by two different methods, were investigated by cyclic voltammetry, methanol oxidation tests and DMFC performance. The platinum particle structure in PEDOT/PSS (poly?styrene sulfonic acid) films was investigated by SEM and TEM. Our research work showed that PEDOT influenced the catalytic activity behavior in three different ways when it was applied to the anode, cathode and the gas diffusion layer. The DMFC performance agreed with the cyclic voltammetry and methanol oxidation test results.     

Improving the efficiency of organic photovoltaic cells by introducing an ultrathin modification layer with a strong dipole moment

A method to improve the efficiency of organic photovoltaic cells through inclusion of an ultrathin modification layer of Al2O3 or LiF sandwiched between poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid(PEDOT:PSS) and indium tin oxide layers is developed.Because of the strong dipole moments of LiF and Al2O3,either can enhance the built-in electric field,which increases the probability of the carriers reaching the corresponding electrode.In addition,the low work function of PEDOT:PSS can decrease the energy barrier for carrier transmission.A 21.7% improvement in the power conversion efficiency of experimental devices was achieved,mainly because the short circuit current was enhanced by almost 30%.     

用背反射提高染料敏化太阳电池光吸收的研究

介绍了一种提高染料敏化太阳电池光吸收的背反射结构,以解决染料在长波范围吸光能力差的缺点。用P25纳米TiO2粉和水热法两种不同工艺制备了电池。透过光谱测试表明,两种工艺制备的电池对长波范围的光都没有充分利用,水热法制备的电池更透明。太阳模拟器测试结果表明,用银反光膜作为电池的背反射结构,增加了染料对长波范围内的光吸收,显著提高了电池的光电转换效率。P25粉工艺制备的电池效率提高了11.4%,水热法工艺制备的电池效率提高了22%。     

高性能导电高分子PEDOT/PSS研究进展

高电导率、对空气和水高度稳定、可溶液加工处理、成本低一直是导电高分子研究领域研究人员追求的目标.经过20多年的研究发现聚噻吩的衍生物聚（二氧乙撑噻吩）与聚对苯乙烯磺酸（简写PEDOT/PSS）可以在水中形成稳定的悬浮液,涂布后可以形成高性能的导电膜,电导率可达103 S cm-1（掺杂适量的极性有机溶剂）,且对热、光、水、空气均具有良好的稳定性,可见光透过率良好,与其它助剂一起可以实现更优良的性能,因此在众多工业领域取得了广泛研究和应用.本文将介绍PEDOT/PSS的历史、制备方法、复合材料以及在抗静电、电致变色、有机发光二极管、太阳能电池等方面的应用.     

Preparation of Gd2O3:Eu3+ downconversion luminescent material and its application in dye-sensitized solar cells

Gd₂O₃:Eu³⁺ downconversion luminescent powder was prepared using the homogeneous precipitation method. Its optical properties were analyzed and it was introduced into a dye-sensitized solar cell (DSSC). As a luminescence medium, Gd₂O₃:Eu³⁺ improved light harvesting via conversion luminescence and increased the photocurrent of the DSSC. As a p-type dopant insulating rare earth oxides form an energy barrier, and the Gd₂O₃:Eu³⁺ elevated the energy level of the oxide film and increased the photovoltage. The photoelectric conversion efficiency for a DSSC with Gd₂O₃:Eu³⁺ doping (6:100) reached 7.01%, which was 17.4% higher than the photoelectrical conversion efficiency of a DSSC without Gd₂O₃:Eu³⁺ doping.     

Blue TiO2 polymorph: An efficient material for dye-sensitized solar cells fabricated using a low-temperature sintering process

Recently,surface-disordered or non-stoichiometric TiO_2,such as blue TiO_2(B-TiO_2),has received much attention owing to its unique properties,such as structural disorder near the surface and the existence of Ti~(3+)ions and oxygen vacancies.Therefore,surface-disordered TiO_2has been applied for microwave absorption,photocatalysis,in photoelectrochemical sensors and rechargeable lithium-ion batteries.In this work B-TiO_2,a polymorph consisting of nanoparticles,nanotubes and nanosheets,was successfully synthesized and employed as a semiconductor layer in dye-sensitized solar cells(DSSCs)fabricated using a low-temperature heat treatment process(120°C).Based on the analyses of the experimental results regarding the structure and those from the characterization of B-TiO_2,and its application to DSSCs,it has been found that the B-TiO_2 material has an effect on electron-hole pair separation.The conversion efficiency of the B-TiO_2 DSSC(BTiO_2-DSSC)was 6.18%,whereas that of the TiO_2-P25 DSSC(P25-DSSC)was 3.61%,and that of the TiO_2 polymorph DSSC(PTiO_2-DSSC)which is the precursor of B-TiO_2 was 4.51%.     

A novel method for preparing platinized counter electrode of nanocrystalline dye-sensitized solar cells

The platinized FTO glass counter electrode was prepared by employing techniques of colloid preparation, Langmuir-Blodgett film and serf-assembly. The present electrode had very low platinum loading, high catalytic activity for iodine/triiodide reduction reaction. Compared with the conventional counter electrodes used in nanocrystalline dye-sensitized solar cells, the present electrode had provided a much higher catalytic performance which was attributed to the structure of platinum nanoclusters distributed homogeneously on the electrode.     

Low temperature fabrication of high performance and transparent Pt counter electrodes for use in flexible dye-sensitized solar cells

High performance Pt counter electrode is prepared by using vacuum thermal decomposition at a relatively low (120℃) temperature on a flexible polyethylene naphthalate substrate coated with indium-doped tin oxide for use in flexible dye-sensitized solar cells.The obtained Pt counter electrode shows a good chemical stability,high light transmittance,and high electrocatalytic activity for the I3-/I-redox reaction.The energy conversion efficiency of a flexible dye-sensitized solar cell based on the prepared Pt counter electrode and a TiO 2 /Ti photoanode reaches 5.14% under a simulated solar light irradiation with intensity of 100 mW cm-2.     

Progress on the Electrolytes for Dye-sensitized Solar Cells

1 Results The development of a new type of solar cell has been promoted by public concern about pollution and energy consumption.Since the prototype of a dye-sensitized solar cell (DSC) was reported in 1991 by M.Gratzel,it has aroused intensive interest over the past decade due to its low cost and simple preparation procedure.The typical cell is a sandwiched structure consisting of a dye-sensitized TiO2 electrode,a platinized counter electrode and a filled redox couple electrolyte between the electrodes...     

三苯胺类太阳能电池染料敏化剂的研究进展

染料敏化太阳能电池(简称DSSC)以成本低、易于制造、可大面积生产和环保的特点受到广泛关注。染料敏化剂是DSSC的核心组成部分,起着收集太阳光并将激发态电子注入到半导体导带的作用,对光电转换效率至关重要。有机染料易于合成,通过分子设计可以调控光物理和电化学特性。三苯胺是强的供电子基团,其非平面空间结构使得染料分子聚集程度减弱,这些性能均有利于提高染料的吸收性能和电子传输效率。以三苯胺或取代三苯胺作为给电子体的有机染料敏化剂,提高了太阳能电池的光电转化效率,是近年来的研究热点。