Photoconductivity of ZnTe thin films at elevated temperatures

[摘要] Photoconductivity of thermally evaporated ZnTe thin films was studied at different elevated temperatures. A gap type cell configuration with Al electrodes on glass substrates was used. The conductivity was found to obey two distinct conduction mechanisms within the region of applied fields. At low fields the photoconduction is ohmic and at high fields it is of Pooleâ€�?�Frenkel type. With increase of ambient temperatures, the Pooleâ€�?�Frenkel conductivity regions were found to extend to lower fields. The temperature dependence of dark conductivity also was found to be of similar nature.

[学科分类] 材料工程

[关键词] Photoconductivity;ZnTe thin films;Pooleâ€�?�Frenkel.