| 五甲川菁染料敏化SnO_2纳光结构多孔膜电极的光电化学研究 |
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| 引用本文： | 张莉,杨迈之,乔学斌,郝彦忠,王艳琴,蔡生民,孟凡顺,田禾.五甲川菁染料敏化SnO_2纳光结构多孔膜电极的光电化学研究[J].化学学报,1999(10). |
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| 作者姓名： | 张莉 杨迈之 乔学斌 郝彦忠 王艳琴 蔡生民 孟凡顺 田禾 |
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| 作者单位： | 北京大学化学与分子工程学院 北京100871
(张莉，杨迈之，乔学斌，郝彦忠，王艳琴，蔡生民)，华东理工大学精细化工研究所 上海200237
(孟凡顺)，华东理工大学精细化工研究所 上海200237(田禾) |
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| 基金项目： | 国家自然科学基金(29773003)，北京分子动态及稳态实验室部分资助 |
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| 摘 要： | 研究了五甲川菁敏化SnO_2纳米结构电极的光电化学行为.结合循环伏安曲线图及五甲川菁的光吸收阈值,初步确定五甲川菁染料电子基态和激发态能级位置.结果表明,五甲川菁染料电子激发态能级位置能与SnO_2纳米粒子导带边位置相匹配,因而使用该染料敏化可以显著地提高SnO_2纳米结构电极的光电流,使SnO_2纳米结构电极吸收波长红移至可见光区和近红外区,光电转换效率得到明显改善,IPCE值(单色光的转换效率)最高可达45.7％.
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| 关 键 词： | 染料敏化 SnO_2纳米结构多孔膜电极 光电化学 五甲川菁 |
Photoelectrochemical Studies on the SnO_2 Nanostructured Porous Film Sensitized by Cyanine Dye |
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| ZHANG Li YANG Mai - Zhi QIAO Xue - Bin HAO Yan - Zhong WANG Yan - Qin CAI Sheng - Min.Photoelectrochemical Studies on the SnO_2 Nanostructured Porous Film Sensitized by Cyanine Dye[J].Acta Chimica Sinica,1999(10). |
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| Authors: | ZHANG Li YANG Mai - Zhi QIAO Xue - Bin HAO Yan - Zhong WANG Yan - Qin CAI Sheng - Min |
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| Abstract: | The photoelectrochemical behaviors of the SnO_2 nanostructured porous film sensitized by cyanine dye were investigated. The ground state level and the excited state level of the dye were determined by using the cyclic voltammetry and the optical absorption spectroscopy. The results show that the excitation state level matches the conduction band edge of SnO2 nanoparticle. Therefore the sensitization of this dye can increase the photocurrent intensity of SnO2 nanostructured electrode obviously and results in a red - shift of optical absorption from the ultra - violet region to the visible and near infra - red region. As a result, the light - to - electricity conversion efficiency is improved evidently and the maximum value of IPCE has reached 45.7% . |
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| Keywords: | dye sensitization SnO_2 nanostructured porous film electrode photoelectrochemistry cyanine dye |
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