Colloidal chemically fabricated ZnO : Cu-based photodetector with extended UV-visible detection waveband

• DOI: 10.1039/c3nr01979a
• Publication Date: 2013-08-15T16:06:28Z
• Authors: Liang Hu; Liping Zhu; Haiping He; Yanming Guo; Guoyao Pan; Jie Jiang; Yizheng Jin; Luwei Sun; Zhizhen Ye
• Keywords: 01 natural sciences; 0104 chemical sciences

Polycrystalline ZnO : Cu-based film photodetectors with extended detection waveband (UV and visible light) were fabricated using facile colloidal chemistry and a post-annealing process. The obtained detectors are highly sensitive to visible light and can realize the response switch between UV and visible light. A native and extrinsic trap cooperatively controlled space charge limited (SCL) transport mechanism is proposed to understand this complex photoconduction behaviour.