向列相液晶4-氰基-4＇-庚基联苯和4-氰基-4＇-戊基联苯在准固态染料敏化太阳电池中的应用  

Application of nematic liquid crystals,4-cyano-4'-heptylbiphenyl and 4-cyano-4'-pentylbiphenyl,in quasi-solid-state dye-sensitized solar cells

作　　者：王猛[1] 潘旭[1] 郭磊[1] 李文欣[1] 霍志鹏[1] 戴松元[1] 

机构地区：[1]中国科学院新型薄膜太阳电池重点实验室,中国科学院等离子体物理研究所,合肥230031

出　　处：《中国科学：化学》2011年第6期995-1000,共6页SCIENTIA SINICA Chimica

基　　金：国家重点基础研究发展计划(973计划,2011CBA00700);国家高技术研究发展计划(863计划,2009AA050603);中国科学院知识创新工程重要方向项目(KGCX2-YW-326);合肥物质科学研究院创新项目(075FCQ0125)资助

摘　　要：将两种向列相液晶,4-氰基-4'-庚基联苯和4-氰基-4'-戊基联苯,引入到染料敏化太阳电池(DSC)用偏氟乙烯-六氟乙烯共聚物基准固态电解质中,以期提高DSC的光电转化效率.研究了液晶的引入对电解质中I-/I3-的氧化还原行为、DSC中TiO2/电解质界面的暗反应以及DSC光伏性能的影响.结果表明,尽管液晶的引入会降低电解质中I-/I3-的传输并且使得DSC中暗反应加快,但是DSC的短路电流密度却显著地提高,使DSC的光电转化效率增加.这可能是由于液晶的引入改善了DSC中的界面接触以及增加染料的光吸收引起的.Two nematic liquid crystals,4-cyano-4＇-heptylbiphenyl and 4-cyano-4＇-pentylbiphenyl,are introduced into the poly（vinylidenefluoride-co-hexafluoropropylene）（PVDF）based polymeric gel electrolyte for quasi-solid-state dye-sensitized solar cells（DSC）,aiming to improve the photovoltaic performance of quasi-solid-state DSC.The influence of addition of liquid crystal on the redox behavior of I-/I 3-,the recombination reaction at the TiO2/electrolyte interface and the photovoltaic performance of quasi-solid-state DSC are studied.It is found that although the addition of liquid crystals in PVDF based polymeric gel electrolyte would decrease the transport of I-/I 3-and accelerate the recombination reaction of the quasi-solid-state DSC,it still benefits the short-circuit current density remarkably,resulting in higher photo-electric conversion efficiency.This may be associated with the improvement of interfacial contact and the enhancement of light harvesting efficiency of quasi-solid-state DSC due to the addition of liquid crystal.

关 键 词：染料敏化太阳电池 准固态 液晶 

分 类 号：TM914.4[电气工程—电力电子与电力传动]