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CdS敏化对TiO2纳米薄膜电极光生电荷转移特性的影响
引用本文:钱新明,宋庆,白玉白,李铁津,汤心颐,董绍俊,汪尔康.CdS敏化对TiO2纳米薄膜电极光生电荷转移特性的影响[J].高等学校化学学报,2000,21(2):295-297.
作者姓名:钱新明  宋庆  白玉白  李铁津  汤心颐  董绍俊  汪尔康
作者单位:1. 中国科学院长春应用化学研究所电分析化学开放实验室,长春,130022;吉林大学化学系,长春,130023
2. 吉林大学化学系,长春,130023
3. 中国科学院长春应用化学研究所电分析化学开放实验室,长春,130022
基金项目:中国科学院资助项目,29773017,
摘    要:1991年Gratzel等1]以敏化的TiO2纳米薄膜电极组成的液体结光电化学太阳能电池(PEC),其光电转换效率(IPCE)达到10%. 最近,选用固态电解质使这种PEC的IPCE达到33%2].于是用有机染料3,4]及窄带隙半导体纳米微粒5]敏化的电极受到了广泛关注.

关 键 词:电极敏化  光生电荷转移  氧化钛薄膜电极  硫化镉

Effect on the Property of the Photoinduced Carrier Transport of CdS as Sensitizer for TiO2 Nanoparticulate Thin Films
QIAN Xin-Ming,SONG Qing,BAI Yu-Bai,LI Tie-Jin,TANG Xin-Yi,DONG Shao-Jun,WANG Er-Kang.Effect on the Property of the Photoinduced Carrier Transport of CdS as Sensitizer for TiO2 Nanoparticulate Thin Films[J].Chemical Research In Chinese Universities,2000,21(2):295-297.
Authors:QIAN Xin-Ming  SONG Qing  BAI Yu-Bai  LI Tie-Jin  TANG Xin-Yi  DONG Shao-Jun  WANG Er-Kang
Abstract:The TiO 2 nanoparticle thin films have been sensitized in situ with CdS nanoparticles. The SPS measurement showed that large surface state density was present on the TiO 2 nanoparticles and the surface state can be efficiently decreased by sensitization as well as selecting suitable heat treatment. Both the photocurrent response and the charge recombination kinetics in TiO 2 thin films were strongly influenced by trapping/detrapping of surface states. The slow photocurrent response of TiO 2 nanoparticulate thin films upon the illumination was attributed to the trap saturation effects. The semiconductor sensitization made the slow photoresponse disappeared and the steadystate photocurrent value increased drastically, which suggested that the sensitization of TiO 2 thin films with CdS could get a better charge separation and provide a simple alternative to minimize the effect of surface state on the photocurrent response.
Keywords:CdS  Sensitization  TiO_2 nanoparticulate thin films  Photoinduced carrier transport
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