Low-Cost UV-IR Dual Band Detector Using Nonporous ZnO Film Sensitized by PbS Quantum Dots  

作　　者：邵佳锋 A. G. U. Perera P. V. V. Jayaweera 贺德衍 

机构地区：[1]School of Physics Science and Technology, Lanzhou University, Lanzhou 730000 [2]Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA

出　　处：《Chinese Physics Letters》2010年第2期260-262,共3页中国物理快报（英文版）

摘　　要：A low-cost photoconductive dual-band detector was prepared using a nanoporous ZnO film sensitized by PbS quantum dots （QDs）. At room temperature the device shows a UV response in the wavelength range of 200-400 nm with a 370 nm peak responsivity of 4.0×105 V/W and a vis-NIR response from 500 to 1400 nm with a 700 nm peak responsivity of 5.4×105 V/W. By increasing the size of the PbS QD, the response can be extended up to 2.9 μm. It is suggested that the UV response is a result of interband absorption of UV radiation by ZnO and the IR response comes from the absorption of PbS QDs.A low-cost photoconductive dual-band detector was prepared using a nanoporous ZnO film sensitized by PbS quantum dots （QDs）. At room temperature the device shows a UV response in the wavelength range of 200-400 nm with a 370 nm peak responsivity of 4.0×105 V/W and a vis-NIR response from 500 to 1400 nm with a 700 nm peak responsivity of 5.4×105 V/W. By increasing the size of the PbS QD, the response can be extended up to 2.9 μm. It is suggested that the UV response is a result of interband absorption of UV radiation by ZnO and the IR response comes from the absorption of PbS QDs.

关 键 词：Chinese climate network complex systems small world COMMUNITY 

分 类 号：TN21[电子电信—物理电子学] TN304.21