ZnO在辐射场中的光激发特性研究

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英文篇名：Optical Excitation Characteristics of ZnO under the Radiation Fields 作者：尹文怡 ; 刘玉柱 ; 张启航 ; 李炳生 ; 秦朝朝 英文作者：YIN Wen-yi;LIU Yu-zhu;ZHANG Qi-hang;LI Bing-sheng;QIN Chao-chao;Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean,Nanjing University of Information Science &Technology;Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology (CICAEET);Institute of Modern Physics,Chinese Academy of Sciences;College of Physics and Materials Science,Henan Normal University; 关键词：ZnO ; 辐射场 ; 光谱 ; 激发特性 英文关键词：Zinc oxide;;Radiation field;;Spectrum;;Excited character 中文刊名：GUAN 英文刊名：Spectroscopy and Spectral Analysis 机构：南京信息工程大学江苏省大气海洋光电探测重点实验室;江苏省大气环境与装备技术协同创新中心;中国科学院近代物理研究所;河南师范大学物理与材料科学学院; 出版日期：2018-05-15 出版单位：光谱学与光谱分析 年：2018 期：v.38 基金：国家重点研发计划(2017YFC0212700);; 国家自然科学基金项目(11475229,11304157);; 江苏省六大人才高峰高层次人才项目(2015-JNHB-011)资助 语种：中文; 页：GUAN201805006 页数：5 CN：05 ISSN：11-2200/O4 分类号：26-30

摘要

采用密度泛函理论的BPV86方法,在6-311G++(d,p)基组水平上优化了不同外电场(0~0.080a.u.)下氧化锌分子的基态稳定构型,在此基础上利用同样的方法计算了氧化锌分子的分子结构、偶极矩、总能量、能隙以及红外光谱和紫外-可见吸收光谱强度。结果表明,在外电场的作用下,分子结构变化明显,与电场呈现强烈的依赖关系。随着正向外加电场的增加,ZnO分子键长一直在增大,电偶极距也是一直增大,分子总能量不断减小,分子能隙不断减小,红外光谱吸收峰出现红移现象。随着外电场的加强,分子紫外可见吸收光谱振子强度先增大后减小再增大再减小反复变化,其波峰则出现蓝移现象。
        Based on the density functional theory DFT/BVP86 at 6-311++g(d,p)level,the ground states of ZnO molecule under different external electric fields are optimized.The influence of external electric field ranges from 0 to 0.08 a.u.on the geometrical parameters,dipole moment,total energy,energy gap.,Infrared spectrum and UV-VIS absorption spectrum intensity are studied.The results show that the change of molecular structure is obvious,and it becomes strongly dependent on the field strength.As the electric field changes from 0 to 0.08 a.u.,the bond length of ZnO molecular increases.And the electric dipole moment is proved to be increasing and the total molecular energy is decreasing all the time.The energy gap of EGis found to decrease with the increasing external field.The IR vibration spectrum of ZnO molecule shows an observable red shift.The oscillator strength of UV-Vis absorption spectrum is proved to be repeating the changes of the first increasing and then decreasing.The ultraviolet absorption peak is blue-shifted with the increase of the field intensity.

引文

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