氢离子辐照的ZnO纳米棒中固有缺陷的演变

Evolution of native defects in ZnO nanorods irradiated with hydrogen ion.

作者信息

Wu Tengfei, Wang Aiji, Zheng Li, Wang Guangfu, Tu Qingyun, Lv Bowen, Liu Zilin, Wu Zhenglong, Wang Yinshu

机构信息

Department of Physics, Beijing Normal University, Beijing, 100875, China.

College of Nuclear Science and Technology, Beijing Normal University, Beijing, 100875, China.

出版信息

Sci Rep. 2019 Nov 22;9(1):17393. doi: 10.1038/s41598-019-53951-3.

DOI:10.1038/s41598-019-53951-3

PMID:31758068

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6874528/

Abstract

This work reports the study on the evolution of native defects in ZnO nanorods irradiated with hydrogen ion. ZnO nanorod arrays grown vertically on silicon substrates were irradiated by 180 keV H ions to a total fluence of 8.50 × 10 ions/cm. The X-ray diffraction spectra, photoluminescence spectra before and after irradiation and the real-time ionoluminescence spectra of the nanorod arrays during the irradiating process were measured. Formation and evolution of defects during H ion irradiation and effects of irradiation on the crystal structure and optical property were studied. Blue shift of exciton emission, shrink of lattice c and improvement of the crystallinity of ZnO nanorods after irradiation were observed. Simple surface passivation of the nanorods could improve the radiation resistance. Formation and evolution of the defects during H ion irradiation could be clarified into four stages and the related models are provided.

摘要

这项工作报道了氢离子辐照氧化锌纳米棒中本征缺陷演化的研究。垂直生长在硅衬底上的氧化锌纳米棒阵列被180 keV的氢离子辐照，总注量为8.50×10离子/cm。测量了辐照前后的X射线衍射光谱、光致发光光谱以及辐照过程中纳米棒阵列的实时离子发光光谱。研究了氢离子辐照过程中缺陷的形成与演化以及辐照对晶体结构和光学性质的影响。观察到辐照后氧化锌纳米棒的激子发射蓝移、晶格c收缩以及结晶度提高。纳米棒的简单表面钝化可以提高抗辐射能力。氢离子辐照过程中缺陷的形成与演化可分为四个阶段，并给出了相关模型。