Photoelectrical properties of CdS/CdSe core/shell QDs modified anatase TiO2 nanowires and their application for solar cells
Photoelectrical properties of CdS/CdSe core/shell QDs modified anatase TiO2 nanowires and their application for solar cells
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CdS/CdSe核/壳量子点修饰锐钛矿TiO2纳米线的光电性能及其在太阳能电池中的应用
DOI：
10.1039/c7cp02358h
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发表时间：
2017
影响因子：
3.3
通讯作者：
Xie Tengfeng
中科院分区：
文献类型：
--
作者：
Qiu Qingqing;Wang Ping;Xu Lingling;Wang Dejun;Lin Yanhong;Xie Tengfeng
采用后合成配体辅助技术成功制备了CdS/CdSe核壳结构量子点修饰的锐钛矿型TiO 2纳米线薄膜。表面光电压（SPV）、瞬态光电压（TPV）和瞬态光电流（TPC）的测量结果表明，CdS/CdSe核壳结构量子点的特殊光电特性使得CdS/CdSe核壳结构量子点敏化的TiO 2纳米线电极有利于光激发电子注入和电荷转移。使用聚硫化物电解质，对于具有4.4纳米厚的CdSe壳的CdS/CdSe QD，最大转换效率为2.18%;在100 mW cm-2的照射下，CdS QD的PCE为0.07%，CdSe QD的PCE为0.63%。结果表明，CdS/CdSe核壳结构量子点敏化TiO 2纳米线电极在太阳能电池中具有良好的应用前景。
Anatase TiO2 nanowire (NW) films modified with inverted type-I CdS/CdSe core/shell structure QDs have been successfully prepared by the post synthesis ligand-assisted technique. Surface photovoltage (SPV), transient photovoltage (TPV) and transient photocurrent (TPC) measurements demonstrate that CdS/CdSe core/shell structure QD-sensitized TiO2 NWs electrodes favor photoexicited electron injection and charge transfer due to the special photo-electronic features of CdS/CdSe core/shell structure QDs. With a polysulfide electrolyte, the maximum conversion efficiency was 2.18% for CdS/CdSe QDs with the CdSe shell being 4.4 nanometers thick; a PCE of 0.07% for CdS QDs and a PCE of 0.63% for CdSe QDs were obtained under illumination at 100 mW cm−2. The results reveal that the CdS/CdSe core/shell structure QDs sensitized TiO2 NW electrodes have promising applications in solar cells.