有机/无机复合结构光电导型器件的光激发机制  

Photoexcitation Mechanism of Photoconductive Device by Organic/Inorganic Thin-Film Heteropairing

作　　者：靳辉[1] 滕枫[1] 刘俊峰[1] 孟宪国[1] 徐征[1] 侯延冰[1] 徐叙瑢[1] 

机构地区：[1]北京交通大学光电子技术研究所

出　　处：《光谱学与光谱分析》2004年第8期918-921,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (90 30 1 0 0 4 );高等学校博士学科专项科研基金(2 0 0 2 0 0 0 4 0 0 4 );北京市自然科学基金 (2 0 52 0 1 5);北京交通大学论文基金;"973"项目(2 0 03CB31 4 70 7)资助

摘　　要：制备了PVK/ZnS有机无机复合的光电导型器件 ,器件结构分别为Glass/ITO/PVK/Al;Glass/ITO/ZnS/Al;Glass/ITO/ZnS/PVK/Al。通过研究此复合器件在外加电场作用下的稳态光电导激发谱 ,得到了基本光激发过程。把PVK/ZnS的吸收谱和器件的光电导谱进行比较 ,知道虽然两者的吸收对器件光电流都有贡献 ,但有效部分在PVK和ZnS的界面处。Photoconductive devices with organic (polyvinylcarbazole-PVK)/inorganic (zinc-sulfide-ZnS) thin-film heteropairing were fabricated. In external field, the excitation profile of the steady-state photoconductivity and the primary photoexcitation process of hybrid devices were presented and discussed. Comparison of photoconductivity of the devices and absorption spectra of PVK and ZnS implied that both layers absorption contributes to the photocurrent, but the effective part is at the interface of PVK and ZnS. The dependence of maximum photocurrent on the applied voltage and the dark and illuminated current spectra indicates the ultrafast charge transfer at the interface.

关 键 词：有机/无机复合结构光电导型器件 光激发机制 激发态过程 稳态光电导谱 吸收谱 场致猝灭谱 

分 类 号：TN15[电子电信—物理电子学]