N3/Al2O3/N749交替组装结构拓宽准固态染料敏化太阳能电池光响应范围和界面修饰效果

doi:10.3866/PKU.WHXB201210233

物理化学学报 >> 2013, Vol. 29 >> Issue (01): 73-81.doi: 10.3866/PKU.WHXB201210233

N3/Al₂O₃/N749交替组装结构拓宽准固态染料敏化太阳能电池光响应范围和界面修饰效果

高瑞, 牛广达, 王立铎, 马蓓蓓, 邱勇

清华大学化学系, 有机光电子及分子工程教育部重点实验室, 北京 100084

收稿日期:2012-08-14 修回日期:2012-10-19 发布日期:2012-12-14
通讯作者: 王立铎 E-mail:chldwang@mail.tsinghua.edu.cn
基金资助:
国家自然科学基金(50873055)和国家重点基础研究发展规划项目(973) (2009CB930602)资助

N3/Al₂O₃/N749 Alternating Assembly Structure Broadening the Photoresponse and Interface Modification Effects in Quasi-Solid Dye-Sensitized Solar Cells

GAO Rui, NIU Guang-Da, WANG Li-Duo, MA Bei-Bei, QIU Yong

Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China

Received:2012-08-14 Revised:2012-10-19 Published:2012-12-14
Supported by:
The project was supported by the National Natural Science Foundation of China (50873055) and National Key Basic Research Program of China (973) (2009CB930602).

摘要/Abstract

摘要：

研究了染料敏化太阳能电池(DSCs)中N3/Al₂O₃/N749交替组装结构的作用. 该结构使用Al₂O₃作为介质层吸附第二层染料, 可以有效拓宽DSCs的光响应范围, 提高电池的光电转化效率. UV-Vis 吸收光谱和单色光转换效率(IPCE)谱测试结果表明, 相对于单一染料, 使用交替组装结构的电池光响应范围变宽. 电流-电压(I-V)曲线结果表明, 该结构有效增加了DSCs 电池的光电转化效率, 从单一N3 和N749 染料的4.22%和3.09%增加到了5.75%, 分别增加了36%和86%. 为了研究该结构的作用机理, 本文对其界面修饰作用及界面电子过程进行了讨论. 暗电流测试结果表明交替组装结构可以有效阻止电荷复合过程; 电化学阻抗谱(EIS)结果表明在黑暗条件下, N3/Al₂O₃/N749结构可以提高界面电阻, 从而抑制电荷复合过程; 本文建立了等效电路模型, 并使用该模型讨论了交替组装结构的界面电子过程; 调制强度光电流谱(IMPS)和调制强度光电压谱(IMVS)的结果表明该结构可以提高电子寿命和改善电子扩散.

关键词: 交替组装结构, 光响应范围, 电荷复合, 电子过程

Abstract:

In this paper, the interface modification effects and electron processes in N3/Al₂O₃/N749 alternating structured dye-sensitized solar cells (DSCs) were studied. UV-Vis absorption and monochromatic incident photon-to-electron conversion efficiency (IPCE) spectra showed that the N3/Al₂O₃/ N749 structure broadened the photo-response range. Photocurrent-voltage (I-V) curves showed that enhanced conversion efficiencies were obtained. Compared with N3- and N749-only structures, the efficiency of the N3/Al₂O₃/N749 structure increased from 4.22% and 3.09% to 5.75% (36% and 86% enhancement), respectively. From electrochemical impedance spectroscopy (EIS) results, the N3/Al₂O₃/ N749 structure displayed increased interface resistance under dark conditions. This indicates that charge recombination is reduced in the N3/Al₂O₃/N749 device, which was confirmed from the dark current measurements. Furthermore, to analyze the electron processes, a series of equivalent circuit models were built to mimic the injection and recombination process in DSCs. Intensity modulated photocurrent spectroscopy (IMPS) and intensity modulated photovoltage spectroscopy (IMVS) also showed that this structure improved the electron life time and diffusion.

Key words: Alternating assembly structure, Photoresponse range, Charge recombination, Electron process

MSC2000:

O649

高瑞, 牛广达, 王立铎, 马蓓蓓, 邱勇. N3/Al₂O₃/N749交替组装结构拓宽准固态染料敏化太阳能电池光响应范围和界面修饰效果[J]. 物理化学学报, 2013, 29(01): 73-81.

GAO Rui, NIU Guang-Da, WANG Li-Duo, MA Bei-Bei, QIU Yong. N3/Al₂O₃/N749 Alternating Assembly Structure Broadening the Photoresponse and Interface Modification Effects in Quasi-Solid Dye-Sensitized Solar Cells[J]. Acta Phys. -Chim. Sin., 2013, 29(01): 73-81.

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[1]	高瑞, 马蓓蓓, 王立铎, 史彦涛, 董豪鹏, 邱勇. 电化学阻抗谱研究染料/Al₂O₃交替组装结构的光伏特性及作用机理[J]. 物理化学学报, 2011, 27(02): 413 -418 .
[2]	周淑琴,邓晓东. 酞菁复合膜的组装技术及光电子过程表征[J]. 物理化学学报, 1997, 13(06): 560 -563 .

N3/Al₂O₃/N749交替组装结构拓宽准固态染料敏化太阳能电池光响应范围和界面修饰效果

N3/Al₂O₃/N749 Alternating Assembly Structure Broadening the Photoresponse and Interface Modification Effects in Quasi-Solid Dye-Sensitized Solar Cells

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