摘要
硫化钴纳米材料是一种重点研究的染料敏化太阳能电池对电极材料。本工作以氟掺杂二氧化锡导电玻璃为基片,采用反向恒压电沉积法制备透明硫化钴薄膜。实验结果表明:电镀溶液的pH是硫化钴薄膜表面形貌形成的关键性因素,而电沉积圈数可以有效控制硫化钴薄膜的厚度。电化学测试结果表明:硫化钴薄膜对电极展现出了良好的电催化活性,尤其是在电镀溶液pH为7.2、电沉积圈数为12圈的最佳条件下制备的硫化钴对电极具有大量的纳米薄片状结构,有利于增加电催化活性位点,使得其展现出了比铂电极更加优异的电催化性能。由此电极组装的染料敏化太阳能电池的能量转换效率达到7.26%,10个电池器件的平均效率为7.18%,高于相应铂电极器件的电池效率(6.94%)。
Cobalt sulfide nanomaterials are considered as important counter electrode materials for dye-sensitized solar cells. A potential reversal electrodeposition technique was applied to fabricate transparent cobalt sulfide film with fluorine-doped tin oxide glass as substrate. The experimental results demonstrate that the surface morphology of cobalt sulfide films is mainly dependent on the pH value of plating solution. The thickness of cobalt sulfide films can be effectively controlled by electrodeposition cycles. Then, cobalt sulfide films were used as counter electrodes of dye-sensitized solar cells. Electrochemical measurements prove that cobalt sulfide counter electrodes exhibit high electrocatalytic activity. In particular, under electrodeposition condition of pH 7.2 and 12 cycles, cobalt sulfide counter electrode composed of the nanosheet structure exhibits higher electrocatalytic activity than platinum electrode, due to the increase of electrocatalytic active sites. Meanwhile, remarkable photoelectrical conversion efficiency of the dye-sensitized solar cell based on cobalt sulfide counter electrode is up to 7.26% with an average value of 7.18% for ten devices, which is higher than that of the dye-sensitized solar cell equipped with platinum electrode(6.94%).
作者
蒋青松
陈若婷
李文波
程文杰
黄业晓
胡光
JIANG Qing-Song;CHEN Ruo-Ting;LI Wen-Bo;CHENG Wen-Jie;HUANG Ye-Xiao;HU Guang(Jiangsu Engineering Laboratory for Lake Environment Remote Sensing Technologies,Faculty of electronic information engineering,Huaiyin Institute of Technology,Huai'an 223003,China;Faculty of Mathematics and Physics,Huaiyin Institute of Technology,Huai'an 223003,China;Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province,Huaiyin Institute of Technology,Huai'an 223003,China)
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2018年第8期832-838,共7页
Journal of Inorganic Materials
基金
国家自然科学基金(61704063)
国家级大学生创新创业训练计划项目(201711049004Z)
江苏省凹土资源利用重点实验室开放课题(HPK201503)~~
关键词
对电极
硫化钴
反向恒压电沉积法
薄片状形貌
counter electrode
cobalt sulfide
potential reversal electrodeposition technique
sheet morphology