Department of Materials Science, Fudan University, Shanghai 200433, People's Republic of China ; Department of Physics, Shanghai University of Electric Power, Shanghai 200090, People's Republic of China.
Department of Materials Science, Fudan University, Shanghai 200433, People's Republic of China.
Nanoscale Res Lett. 2014 Aug 11;9(1):388. doi: 10.1186/1556-276X-9-388. eCollection 2014.
Hollow-sphere bilayer nanofilm-based ultraviolet light photodetectors made from ZnO and ZnS spherical nanoshells show enhanced photocurrent, which are comparable to or even better than those of other semiconductor nanostructures with different shapes. In this work, the photocurrent enhancement mechanisms of these bilayer nanofilm-based ultraviolet light photodetectors are explained, which could be attributed to the strong light absorption based on the whispering gallery mode resonances, the separation of the photogenerated carriers through the internal electric field within the bilayer nanofilms, the hopping-like electrical transport, and the effective charge injection from Cr/Au contacts to the nanofilms.
基于中空球双层纳滤膜的 ZnO 和 ZnS 球形纳米壳紫外光光电探测器表现出增强的光电流，其性能可与具有不同形状的其他半导体纳米结构相媲美，甚至更好。在这项工作中，解释了基于双层纳滤膜的紫外光光电探测器的光电流增强机制，这归因于基于 whispering gallery 模式共振的强光吸收、通过双层纳滤膜内的内电场分离光生载流子、类跳跃式的输运以及从 Cr/Au 接触到纳滤膜的有效电荷注入。
