透明硫化钴对电极在染料敏化太阳能电池中的应用

doi:10.15541/jim20170490

无机材料学报 ›› 2018, Vol. 33 ›› Issue (8): 832-838.DOI: 10.15541/jim20170490

所属专题：电催化研究；光伏材料

透明硫化钴对电极在染料敏化太阳能电池中的应用

蒋青松^{1, 2, 3}, 陈若婷², 李文波², 程文杰², 黄业晓², 胡光²

淮阴工学院 1. 电子信息工程学院, 江苏省湖泊环境遥感技术工程实验室;
2. 数理学院;
3. 江苏省凹土资源利用重点实验室, 淮安 223003

收稿日期:2017-10-17 修回日期:2017-12-09 出版日期:2018-08-28 网络出版日期:2018-07-17
作者简介:蒋青松(1987-), 男, 博士研究生, 讲师. E-mail: jiangqingsong05@hyit.edu.cn
基金资助:
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);The Foundation of Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province (HPK201503)

Application of Transparent Cobalt Sulfide Counter Electrodes in Dye-sensitized Solar Cells

JIANG Qing-Song^{1, 2, 3}, CHEN Ruo-Ting², LI Wen-Bo², CHENG Wen-Jie², HUANG Ye-Xiao², HU Guang²

1. Jiangsu Engineering Laboratory for Lake Environment Remote Sensing Technologies, Faculty of electronic information engineering, Huaiyin Institute of Technology, Huai'an 223003, China;
2. Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huai'an 223003, China;
3. Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huai'an 223003, China;

Received:2017-10-17 Revised:2017-12-09 Published:2018-08-28 Online:2018-07-17
About author:JIANG Qing-Song. E-mail: jiangqingsong05@hyit.edu.cn
Supported by:
National Natural Science Foundation of China (61704063);National Training Program of Innovation and Entrepreneurship for Undergraduates (201711049004Z)

摘要/Abstract

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%)。

关键词: 对电极, 硫化钴, 反向恒压电沉积法, 薄片状形貌

Abstract:

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%).

Key words: counter electrode, cobalt sulfide, potential reversal electrodeposition technique, sheet morphology

中图分类号:

TM914

蒋青松, 陈若婷, 李文波, 程文杰, 黄业晓, 胡光. 透明硫化钴对电极在染料敏化太阳能电池中的应用[J]. 无机材料学报, 2018, 33(8): 832-838.

JIANG Qing-Song, CHEN Ruo-Ting, LI Wen-Bo, CHENG Wen-Jie, HUANG Ye-Xiao, HU Guang. Application of Transparent Cobalt Sulfide Counter Electrodes in Dye-sensitized Solar Cells[J]. Journal of Inorganic Materials, 2018, 33(8): 832-838.

图/表 7

图1 (a)~(d) Co-S薄膜的SEM照片;在pH=7.2条件下,电沉积30圈制备的Co-S薄膜SEM (e)和TEM (f)照片;样品S-pH7.2的元素分布图(g)和元素含量百分比(h)

Fig. 1 (a-d) SEM images of Co-S films; (e) SEM and (f) TEM images of Co-S film under electrodeposition condition of pH 7.2 and 30 cycles; (g) The EDS mapping images and (h) element compositions of S-pH7.2

图2 样品S-pH7.2的XPS图谱

Fig. 2 XPS spectra of S-pH7.2 (a) Co2p; (b) S2p

表1 基于Co-S对电极与铂电极的DSC光伏性能参数

Table 1 Photovoltaic performance parameters of DSC based on Co-S and Pt Ces

CE	J_SC/(mA•cm^-2)	V_OC/V	FF	η/%
Pt	15.94	0.67	0.65	6.94
S-C10	19.78	0.69	0.51	6.96
S-C12	18.47	0.69	0.57	7.26
S-C14	17.11	0.69	0.56	6.61
S-C16	16.52	0.69	0.55	6.27
S-pH5.8	14.10	0.70	0.52	5.13
S-pH6.7	16.96	0.68	0.56	6.46
S-pH7.2	18.47	0.69	0.57	7.26
S-pH7.6	11.56	0.67	0.54	4.18

图3 (a)~(b)基于Co-S对电极与铂电极的DSC的J-V曲线和(c)基于S-pH7.2的DSC光伏性能参数分布图

Fig. 3 (a, b) J-V curves of DSC based on Co-S and Pt Ces and (c) photovoltaic parameters of DSC based on S-pH7.2 as a function of device quantity

图4 Co-S对电极与铂电极的CV曲线

Fig. 4 CV curves of Co-S and Pt CEs

图5 对称电池的EIS奈奎斯特图, (a)中的插图是等效电路图

Fig. 5 Nyquist plots of EIS for symmetrical cells with the inset in (a) showing the equivalent circuit The symbols represent experiment data, and the solid lines express fit results for EIS data.

表2 Co-S对电极与铂电极的EIS拟合参数

Table 2 Fitting parameters of EIS for Co-S and Pt Ces

CEs	Pt	S-pH5.8	S-pH6.7	S-pH7.2	S-pH7.6
R_s/Ω	29.55	53.32	45.52	38.95	61.13
R_ct/Ω	17.56	31.21	25.86	16.98	237.10
Z_N/Ω	9.01	10.67	9.69	8.51	20.21

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透明硫化钴对电极在染料敏化太阳能电池中的应用

Application of Transparent Cobalt Sulfide Counter Electrodes in Dye-sensitized Solar Cells

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