基于低共熔溶剂聚合物电解质染料敏化太阳能电池研究  

Deep Eutectic Solvent Based Polymer Electrolyte for Dye-sensitized Solar Cells

作　　者：杨英[1] 张政[1] 高菁[1] 林泽华[1] 严靖园 郭学益[1] 

机构地区：[1]中南大学冶金与环境学院,长沙410083

出　　处：《无机材料学报》2017年第1期25-32,共8页Journal of Inorganic Materials

基　　金：中南大学创新驱动计划项目(2016CX022);中南大学教师基金(905010104);留学回国基金以及中南大学大学生创新创业项目(201510533205;CX2015237)~~

摘　　要：以琼脂糖聚合物为基质,1-甲基-2-吡咯烷酮(NMP)为溶剂,由尿素、氯化胆碱合成的低共熔溶剂(DES)作为添加剂制备聚合物电解质用于制备准固态染料敏化太阳能电池(DSSC)。研究了尿素/氯化胆碱配比、低共熔溶剂添加量对聚合物电解质电化学性能及其DSSC光电性能的影响。研究结果表明:随着尿素/氯化胆碱配比增加,准固态电解质的导电性能增加,尿素、氯化胆碱的配比为2:1时可获得最佳电导率7.24 m S/cm。对不同低共熔溶剂含量电解质进行离子电导率测试研究发现:添加量为20wt%时,电解质获得最佳电导率6.21 m S/cm。染料敏化太阳能电池的光电效率随低共熔溶剂含量的增加先增加后降低,低共熔溶剂添加量为20wt%时,获得最佳光电效率η=3.18%,短路电流密度J_(sc)=10.28 m A/cm^2,开路电压V_(oc)=0.59 V,填充因子FF=0.51。A polymer electrolyte using agarose as polymer matrix, NMP as solvent and deep eutectic solvent （DES） as modifier was investigated and employed in quasi-solid-state dye-sensitized solar cells （DSSC） of which the DES was composed by urea and choline chloride. The ionic conductivity of the polymer electrolytes with different urea /choline chloride ratio was studied. It was found that the maximum ionic conductivity of the polymer electrolyte was obtained at urea/choline chloride ratio of 2：1. Under the optimal urea/choline chloride ratio condition, electrochemical properties of the polymer electrolytes and the photovoltaic properties were systematically characterized by photovoltaic tests and electrochemical impedance spectra （EIS）. The results showed that both ionic conductivity of electrolyte and photovoltaic performances of the DSSC was optimized with DES content of 20wt%, where the device photovoltaic parameters were as follows, Voc at 0.59 V, Jsc at 10.28 rnA/cm2, FF at 0.51, and the cell efficiency at 3.18%.

关 键 词：染料敏化太阳能电池 低共熔溶剂 尿素 氯化胆碱 聚合物电解质 

分 类 号：TM914[电气工程—电力电子与电力传动]