[1]管秋梅,李正阳,张辉朝,等.胶体CdSe/CdTe核壳Ⅱ型量子点敏化太阳能电池[J].东南大学学报(自然科学版),2013,43(6):1248-1252.[doi:10.3969/j.issn.1001-0505.2013.06.022]
 Guan Qiumei,Li Zhengyang,Zhang Huichao,et al.Solar cell sensitized with colloidal type-Ⅱ CdSe/CdTe core/shell quantum dot[J].Journal of Southeast University (Natural Science Edition),2013,43(6):1248-1252.[doi:10.3969/j.issn.1001-0505.2013.06.022]
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胶体CdSe/CdTe核壳Ⅱ型量子点敏化太阳能电池()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第6期
页码:
1248-1252
栏目:
化学化工
出版日期:
2013-11-20

文章信息/Info

Title:
Solar cell sensitized with colloidal type-Ⅱ CdSe/CdTe core/shell quantum dot
作者:
管秋梅李正阳张辉朝崔一平张家雨
东南大学先进光子学中心, 南京210096
Author(s):
Guan Qiumei Li Zhengyang Zhang Huichao Cui Yiping Zhang Jiayu
Advanced Photonics Center, Southeast University, Nanjing 210096, China
关键词:
Ⅱ 型量子点 量子点敏化太阳能电池 转移速率
Keywords:
type Ⅱ quantum dot quantum dot-sensitized solar cell(QDSSC) transport rate
分类号:
O644
DOI:
10.3969/j.issn.1001-0505.2013.06.022
摘要:
为了探讨Ⅱ型量子点在敏化太阳能电池中的应用前景,采用胶体化学法制备了CdSe/CdTe核壳Ⅱ型量子点,替代染料敏化TiO2形成光阳极,与Pt对电极、电解液组装成量子点敏化太阳能电池.电池光电转换性能测量结果表明该电池具有0.86%的能量转换效率.通过测量Ⅱ型量子点吸附在TiO2和FTO基板上的荧光寿命、电池的电化学阻抗谱,探讨电池性能的内在机理.荧光寿命测量结果表明电子从CdSe/CdTe转移到TiO2上速率较慢,从而电荷复合的几率提高,导致CdSe/CdTe核壳量子点敏化电池的短路电流密度较低.电化学阻抗谱表明Ⅱ型量子点具有更长的电子寿命,由此显示其在太阳能电池应用上具有潜在的优势.
Abstract:
In order to investigate the application prospect of the type Ⅱ quantum dot(QD)sensitized solar cell, CdSe/CdTe QD is used as the sensitizer of TiO2 in the photoanode, instead of the traditional sensitizer dye, which is fabricated through the colloid chemical method. The structure of the quantum dot-sensitized solar cell(QDSSC)includes three parts, the photoanode, platinum counter electrode and electrolyte. The power conversion efficiency(PCE)of the QDSSC is 0.86% according to the measurement results of photovoltaic conversion. By analyzing the result of the fluorescence decay of type Ⅱ QD adsorbed on the TiO2 and FTO substrate and the electrochemical impedance spectroscopy(EIS), the mechanism of the solar cell is discussed. The comparison between two fluorescence decay lifetimes indicates that the carrier transport rate from CdSe/CdTe QD to TiO2 is relatively slow and then the charge recombination rate is enhanced, so the current density of the CdSe/CdTe core/shell QDSSC becomes lower. The results of the EIS illustrate that the electron lifetime of the CdSe/CdTe QDs is longer, which indicates that the type Ⅱ QD has potential applications in the field of solar cells.

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备注/Memo

备注/Memo:
作者简介: 管秋梅(1978—),女,博士生,讲师;张家雨(联系人),男,博士,教授,博士生导师,jyzhang@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(10774023).
引文格式: 管秋梅,李正阳,张辉朝,等.胶体CdSe/CdTe核壳Ⅱ型量子点敏化太阳能电池[J].东南大学学报:自然科学版,2013,43(6):1248-1252. [doi:10.3969/j.issn.1001-0505.2013.06.022]
更新日期/Last Update: 2013-11-20