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CeO2纳米晶的光伏特性和量子尺寸效应
引用本文:王德军,崔毅,张杰,李铁津,董相廷,洪广言.CeO2纳米晶的光伏特性和量子尺寸效应[J].物理化学学报,1995,11(9):812-817.
作者姓名:王德军  崔毅  张杰  李铁津  董相廷  洪广言
作者单位:Department of Chemistry,Jilin University,Changchun 130023;Institute of Applied Chemistry,Academia Sinica,Changchun 130022
基金项目:国家教委优秀年轻教师基金
摘    要:对制备的CeO2纳米晶进行了反射吸收光谱研究,对其在300-450nm的宽带吸收指认为O2p→Ce4f电荷转移跃迁,发现这个吸收带随着样品粒径变小而红移,利用表面光电压谱方法和场调制表面光电压谱方法不同粒径的CeO2纳米晶的光伏特性进行了研究。并对吸收谱带进行了解析。当样品粒径达到纳米尺寸时,在CeO2价带上大约0.9eV处明显地形成一个新能带。这个能带具有较强的定域性,在相应的跃迁的过程中产生具

关 键 词:纳米晶  CeO2  表面光电压谱  量子尺寸效应  
收稿时间:1994-11-08
修稿时间:1995-03-02

Photovoltaic Properties and Quantum Size Effect in Nanocrystalline CeO_2
Wang Dejun, Cui Yi, Zhang Jie, Li Tiejin.Photovoltaic Properties and Quantum Size Effect in Nanocrystalline CeO_2[J].Acta Physico-Chimica Sinica,1995,11(9):812-817.
Authors:Wang Dejun  Cui Yi  Zhang Jie  Li Tiejin
Institution:Department of Chemistry,Jilin University,Changchun 130023;Institute of Applied Chemistry,Academia Sinica,Changchun 130022
Abstract:Different size nanocrystailines CeO2 were synthesized and their diffose reflectance absorption spectra have been measured. The absorption band in the region from 300 to 450 nm was assigned to the O2p-Ce 4f transition. It was found that a strongly red-shifted broad continuum of the absorption band occured as the decrease of the partical size. We have also measured the surface photovoltage as function of wavelength by SPS technique. And the absorption band was resolved to two peaks with different photovoltaic properties. Photovoltaic quantum size effect was observed by FMSPS measurement.
Keywords:Nanocrystalline  CeO_2  Surface photovoltage  Quantum size effect
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