Enhanced ultraviolet photoresponse based on ZnO nanocrystals/Pt bilayer nanostructure  

作　　者：佟晓林 夏晓智 李青侠 

机构地区：[1]Department of Electronics and Information Engineering,Huazhong University of Science and Technology [2]School of Physics and Electronics,Henan University

出　　处：《Chinese Physics B》2015年第6期534-539,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.41176156)

摘　　要：The development of solution strategies for Zinc oxide （ZnO） quantum dots provides a pathway to utilizing ZnO nanocrystal thin films in optoelectronic devices. In this work, quasi-spherical ZnO quantum dots with a diameter of 5 nm are synthesized by using ethanol as a solvent. ZnO nanocrystal thin film is obtained by spin-coating ZnO quantum dots on a Au interdigital electrode （IDE）/AI203 substrate and annealing at different temperatures in order to yield the optimal pho- tosensitive on/off ratio of ZnO. For further enhancing the responsivity, ion sputtering is utilized to deposit Pt nanoparticles on the surface of ZnO nanocrystal thin film, the responsivity of the ZnO/Pt bilayer nanostructure increases from 0.07 A/W to 54 A/W, showing that the metal/inorganic nanocrystal bilayer nanostructure can be used to improve the performance of optoelectronic devices. The excellent properties of ZnO/Pt bilayer nanostructure have important applications in future electronic and optoelectronic devices.The development of solution strategies for Zinc oxide （ZnO） quantum dots provides a pathway to utilizing ZnO nanocrystal thin films in optoelectronic devices. In this work, quasi-spherical ZnO quantum dots with a diameter of 5 nm are synthesized by using ethanol as a solvent. ZnO nanocrystal thin film is obtained by spin-coating ZnO quantum dots on a Au interdigital electrode （IDE）/AI203 substrate and annealing at different temperatures in order to yield the optimal pho- tosensitive on/off ratio of ZnO. For further enhancing the responsivity, ion sputtering is utilized to deposit Pt nanoparticles on the surface of ZnO nanocrystal thin film, the responsivity of the ZnO/Pt bilayer nanostructure increases from 0.07 A/W to 54 A/W, showing that the metal/inorganic nanocrystal bilayer nanostructure can be used to improve the performance of optoelectronic devices. The excellent properties of ZnO/Pt bilayer nanostructure have important applications in future electronic and optoelectronic devices.

关 键 词：zinc oxide NANOCRYSTALS PHOTORESPONSE ion sputtering plasma treatment 

分 类 号：TB383[一般工业技术—材料科学与工程]