Effect of strain on the structural and optical properties of Cu-N co-doped ZnO thin films |
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Authors: | Yue Zhao Mintao Zhou Zhao Li Zhiyong Lv Xiaoyan Liang Jiahua Min Linjun Wang Weimin Shi |
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Institution: | Department of Electronic Information Materials, Shanghai Leading Academic Disciplines, Shanghai University, Shanghai 200072, PR China |
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Abstract: | Polycrystalline ZnO thin films co-doped with Cu and N have been obtained by chemical bath deposition. Introduction of Cu and N causes the change of strained stress in ZnO films, which subsequently affects the structural and optical properties. The dependence of structural and optical properties of the ZnO films on lattice strained stress is investigated by XRD measurement, SEM, PL spectrum, optical reflection and Raman spectrum. The result of photoluminescence of Cu-N co-doped ZnO films indicates that the UV emission peaks shift slightly towards higher energy side with decrease in tensile strain and vise versa. The blue-shift of the absorption edge and up-shift of E2 (high) mode of the films can be observed in the optical reflection and Raman spectra. |
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Keywords: | ZnO Cu-N co-doped Strain Photoluminescence |
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