基于二级结构TiO_2纳米晶光阳极的高效染料敏化太阳能电池  

TiCl_4 assisted formation of nano-TiO_2 secondary structure in photoactive electrodes for high efficiency dye-sensitized solar cells

作　　者：兰章[1,2,3] 吴季怀[1,2,3] 林建明 黄妙良[1,2,3] 

机构地区：[1]环境友好功能材料教育部工程中心 [2]福建省高校功能材料重点实验室 [3]华侨大学材料物理化学研究所,厦门361021

出　　处：《中国科学：化学》2014年第7期1213-1220,共8页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(U1205112;51002053);教育部科技重点项目(212206);福建省高校杰出青年研究人才项目;福建省新世纪优秀人才支持计划项目;华侨大学中青年教师提升资助计划(ZQN-YX102)资助

摘　　要：本文报道了一种新型的二级结构TiO2纳米晶(nano-TiO2)光阳极的简单制备方法及其在高效染料敏化太阳能电池中的应用.通过添加适量TiCl4异丙醇溶液到传统nano-TiO2浆料中,可生成微米级nano-TiO2聚集体.该二级结构能有效提高光阳极光谱吸收和散射性能及电子传输和收集效率.基于这种结构光阳极的染料敏化太阳能电池光电性能有显著提高.在光阳极中将6μm厚传统nano-TiO2膜用相同厚度nano-TiO2聚集体替换,电池光电转换效率由5.03%提高到7.30%.进一步增加nano-TiO2聚集体的厚度能制备出更高光电转换效率的电池.A new kind of photoactive electrodes with nanocrystalline TiO2 （nano-TiO2） secondary structure is successfully prepared via a simple method of adding suitable amount of TICl4 2-propanol solution in conventional nano-TiO2 paste to form micro-sized nano-TiO2 aggregates. This special structure benefits improved optical absorption, increased light scattering ability, enhanced electron transport and collection efficiency. Dye-sensitized solar cells （DSCs） based on these photoactive electrodes show obviously improved performance. The power conversion efficiency of the cells can increase from 5.03% to a higher value of 7.30% by substituting 6 μm conventional nano-TiO2 thin film with the same thickness of as-prepared nano-TiO2 aggregates film in the photoactive electrodes. A higher power conversion efficiency of the cell can be obtained by further increasing the thickness of the nano-TiO2 aggregates film.

关 键 词：染料敏化太阳能电池光阳极 二级结构 四氯化钛添加剂 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ134.11[化学工程—无机化工]