聚合溶液pH值对染料敏化太阳电池中聚吡咯对电极结构和性能的影响

引用本文: 苏佳, 芦姗, 王莎莎, 张雪华, 付玉彬, 贺涛. 聚合溶液pH值对染料敏化太阳电池中聚吡咯对电极结构和性能的影响[J]. 物理化学学报, 2014, 30(8): 1487-1494. doi: 10.3866/PKU.WHXB201405272 shu

Citation: SU Jia, LU Shan, WANG Sha-Sha, ZHANG Xue-Hua, FU Yu-Bin, HE Tao. Influence of pH Values on the Structure and Performance of a Polypyrrole Counter Electrode for Dye-Sensitized Solar Cells[J]. Acta Physico-Chimica Sinica, 2014, 30(8): 1487-1494. doi: 10.3866/PKU.WHXB201405272 shu

聚合溶液pH值对染料敏化太阳电池中聚吡咯对电极结构和性能的影响

苏佳 ^1,2, ,
芦姗 ^2, ,
王莎莎 ^2, ,
张雪华 ^2, ,
付玉彬 ^1, ,
贺涛 ^2,

基金项目:
科技部（2010DFB63530)

国家自然科学基金（51043010，21203039)

中国科学院项目百人资助项目

摘要:

电化学合成聚吡咯（PPy）时，聚合电解液的pH 值对PPy 薄膜的形貌和性质有较大的影响，进而影响PPy薄膜对I^-/I₃^-的电催化活性以及基于PPy对电极（CE）的染料敏化太阳电池（DSSCs）的光电转换性能. 本文采用电化学恒电位方法，在掺杂氟的SnO₂（FTO）导电玻璃上合成出了对甲苯磺酸根离子掺杂的聚吡咯（PPy-TsO）电极，并将其作为DSSCs 的对电极. 通过改变吡咯聚合时聚合电解液的pH值，借助扫描电镜（SEM）、紫外-可见（UV-Vis）吸收光谱、X-射线光电子能谱（XPS）和循环伏安（CV）等表征技术，详细探讨了聚合溶液pH值对PPy CE形貌、结构及其对I^-/I₃^-的电催化性能的影响. 研究发现在pH 2.0下合成的聚吡咯对阴离子掺杂率最高且链共轭性最佳，具有对I^-/I₃^-氧化还原介质最强的催化能力，基于此PPy CE的电池光电转化效率也最高.pH 值太大或太小都不利于生成具有高掺杂率和高催化活性的PPy电极，组装成DSSCs后的光电转换效率也较低.

关键词:

English

Influence of pH Values on the Structure and Performance of a Polypyrrole Counter Electrode for Dye-Sensitized Solar Cells

1.
1. Institute of Materials Science and Engineering, Ocean University of China, Qingdao 266100, Shandong Province, P. R. China;
2. National Center for Nanoscience and Technology, Beijing 100190, P. R. China
Received Date: 17 April 2014
Available Online: 18 July 2014
Fund Project:
科技部（2010DFB63530)

国家自然科学基金（51043010，21203039)

中国科学院项目百人资助项目

Abstract:

The pH of the solution used to produce an electro- polymerized polypyrrole (PPy) film has a significant impact on the morphology and properties of the resulting film and, by extension, on the electrocatalytic activity of the film for the I^-/I₃^- redox reaction. Accordingly, the performance of dye-sensitized solar cells (DSSCs) based on PPy counter electrodes (CEs) is affected by solution pH. In this study, p-toluene sulfonate ion-doped PPy (PPy-TsO) CEs on fluorine-doped tin oxide (FTO) glass substrates were fabricated using an electrochemical method under a constant bias in solutions with various pH values. The effect of the pH of the synthetic solution on the morphology, structure, and electrocatalytic activity during the I^-/I₃^- redox reaction of the obtained PPy CEs was thoroughly investigated by scanning electron microscopy (SEM), UV-Vis absorption spectroscopy, X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). A pH value of 2.0 was found to represent the optimal value, since the PPy-TsO film produced at this pH exhibited the highest degree of doping, the longest conjugation length, and the highest catalytic activity. When working as the CE of a DSSC, this film also showed the highest power conversion efficiency. Films synthesized at pH values either above or below 2.0 exhibited inferior properties and lower performance when in DSSCs.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

聚合溶液pH值对染料敏化太阳电池中聚吡咯对电极结构和性能的影响

English

Influence of pH Values on the Structure and Performance of a Polypyrrole Counter Electrode for Dye-Sensitized Solar Cells

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

聚合溶液pH值对染料敏化太阳电池中聚吡咯对电极结构和性能的影响

English

Influence of pH Values on the Structure and Performance of a Polypyrrole Counter Electrode for Dye-Sensitized Solar Cells

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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