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Study on the optoelectronic properties of Zn and Mg doped CuGaO2 nanoplates
Optical Materials ( IF 3.9 ) Pub Date : 2021-12-04 , DOI: 10.1016/j.optmat.2021.111865
Li Li 1 , Yingtian Xu 1 , Hanfei Hu 1 , Yuanyuan Jing 1 , Chongyang Xu 1 , He Zhang 1 , Liang Jin 1 , Linlin Shi 1 , Yonggang Zou 1 , Xiaohui Ma 1
Affiliation  

In this study, significant optoelectronic performance boost was observed after Mg and Zn doping of hexagonal CuGaO2 (CGO) nanoplates (NPs) by the hydrothermal method. Details effects of dopant are studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), absorption spectra, and photoluminescence (PL)spectrum. There is a sharp peak at 700 nm in the PL spectrum of pure CGO NPs ascribed to the intrinsic defect caused by Cu vacancy (VCu) and the peak increases dramatically in intensity as elements doping. To deeply understand the enhancement mechanism in PL intensity of Zn-doped CGO (ZCGO) NPs and Mg-doped CGO (MCGO) NPs, the band diagram and radiation transition of divalent ions doped CGO NPs are investigated in detail. These results reveal that the divalent element doping (ZCGO especially) could increase the carrier concentration of CGO material effectively and form stable and high-intensity PL emission. In addition, photodetection performance of pure CGO NPs and doping CGO NPs has been demonstrated, which could be enhanced by constructing non-planar heterojunction of nanoplate and ZnO nanowire arrays. And Zn doping has a significantly better effect than Mg doping in absorption, photoluminescence and ultraviolet (UV) detection. The findings can play an important role in the regard of optoelectronic performance enhancement of CGO NPs, which common used in optoelectronic devices such as red light emitters and ultraviolet (UV) detectors.



中文翻译:

Zn和Mg掺杂CuGaO2纳米片的光电性能研究

在这项研究中,通过水热法对六方 CuGaO 2 (CGO) 纳米片 (NPs) 进行Mg 和 Zn 掺杂后,观察到显着的光电性能提升。通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、吸收光谱和光致发光 (PL) 光谱研究掺杂剂的详细影响。在纯 CGO NPs 的 PL 光谱中,在 700 nm 处有一个尖峰,这归因于由 Cu 空位(V Cu) 并且随着元素的掺杂,峰值强度急剧增加。为了深入了解掺杂Zn的CGO (ZCGO) NPs和掺杂Mg的CGO (MCGO) NPs的PL强度增强机制,详细研究了二价离子掺杂的CGO NPs的能带图和辐射跃迁。这些结果表明,二价元素掺杂(尤其是 ZCGO)可以有效提高 CGO 材料的载流子浓度,形成稳定、高强度的 PL 发射。此外,已经证明了纯 CGO NPs 和掺杂 CGO NPs 的光电检测性能,这可以通过构建纳米板和 ZnO 纳米线阵列的非平面异质结来增强。并且Zn掺杂在吸收、光致发光和紫外(UV)检测方面的效果明显优于Mg掺杂。

更新日期:2021-12-04
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