"Development of Novel Dye-Sensitized Solar Cell using Optimum Sensitizer Molecules"

“利用最佳敏化剂分子开发新型染料敏化太阳能电池”

基本信息

批准号：
05558064
负责人：
YANAGIDA Shozo
金额：
$ 7.55万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1995
项目状态：
已结题

项目摘要

(1) Nanocrystalline films of TiO_2 were successfully prepared. Preparation method was improved to obtained the nanocrystallites with well-defined crystal structure and particle size. The thin films with relatively high electric conductivity was also prepared from the nanocrystallites. The surface of the nanocrystalline films electrode was modified by electrodeposition of highly pure TiO_2 layr.(2) Construction of dye-sensitized TiO_2 solar cell is studied by using a ruthenium complex, cis-di (thiocyanato)-N,N'-bis (2,2'-bipyridyl-4,4'-dicarboxylic acid)-ruthenium (II), as a photosensitizing molecule (dye) on TiO_2 nanocrystallite films from the standpoint of knowing interfacial binding effect on photoenergy conversion efficiency. Photoconversion efficiency is improved by electrochemical treatment of TiO_2 films, or reflux treatment for effective anchoring of the photosensitizing molecules on TiO_2 nanocrystallite films.(3) Characteristics of interfacial binding between dye molecules an … More d TiO_2 surface is determined and compared by using IR and uv-vis spectra. The ester-like linkage and the chelating carboxylato linkage are formed between carboxylic acid groups of ligands in dye molecules and TiO_2 nanocrystallite. The ester-like linkage is observed as major on the film which shows relatively high photoenergy conversion efficiency. The improvement of cell properties such as open circuit cell voltage (V_<oc>) can be explained by decrease in charge on bipyridine ligands of the dye molecule due to the formation of the covalent-like linkage. Importance of binding states between photosensitizing molecules and TiO_2 discussed with a view to achieving high efficiency in dye-sensitized solar cell.(4) A solid-state dye sensitized solar cell was fabricated using a conducting polymer for a electrolyte solution. Electrochemical anodic polymerization of pyrrole was carried out with a dyeadsorbed high porous TiO_2 nanocrystalline film under visible light illumination in a acetonitrile solution containing 0.1M pyrrole and 0.1M LiClO4. Photocurrent due to dye sensitization on the TiO_2 nanocrystalline film was observed. Photoenergy conversion efficiency depended on amounts and doping density of polypyrrole on the TiO_2 nanocrystalline film. Poly (oligoethylen glycol methacrylate) doped with iodide ion was also used as solid electrolyte for solid electrolyte. Less

(1)改进了TiO_2纳米晶薄膜的制备方法,得到了具有良好晶体结构和粒径的纳米晶薄膜,并在纳米晶薄膜表面制备了具有较高电导率的薄膜。通过电沉积高纯TiO_2层对电极进行修饰。(2)利用纳米结构材料研究了染料敏化TiO_2太阳能电池的构建钌配合物，顺式-二（氰硫基）-N,N'-双（2,2'-联吡啶-4,4'-二羧酸）-钌 (II)，作为 TiO_2 纳米微晶薄膜上的光敏分子（染料）从了解界面结合对光能转换效率影响的角度出发，通过对TiO_2薄膜进行电化学处理或回流处理来提高光转换效率。光敏分子在TiO_2纳米晶薄膜上的有效锚定。(3)利用红外光谱和紫外可见光谱测定并比较了染料分子与TiO_2表面的界面结合特征。染料分子中配体的羧酸基团与TiO_2纳米晶之间形成的酯键是主要的。薄膜上显示出相对较高的光能转换效率，例如开路电池电压（V_<oc>）的电池性能的改善可以通过染料分子的联吡啶配体上的电荷减少来解释，这是由于共价-的形成。讨论了光敏分子与TiO_2之间结合态的重要性，以实现染料敏化太阳能电池的高效率。(4)使用导电聚合物制备了固态染料敏化太阳能电池。在含有0.1M吡咯和0.1M LiClO4的乙腈溶液中，用吸附染料的高多孔TiO_2纳米晶薄膜进行电化学阳极聚合，观察到TiO_2纳米晶薄膜上的染料敏化产生的光电流。 .光能转换效率取决于掺杂量和掺杂密度TiO_2纳米晶薄膜上的聚吡咯掺杂碘离子也被用作固体电解质。