MECHANISM FOR SIZE DEPENDENCE OF LIGHT EMISSION FROM ZNO NANOCRYSTALLITES

摘要：

Broadband light emission of different sized ZnO nanoparticles (17 nm to 300 nm) has been measured under picosecond laser excitation. Each spectrum consists of three Gaussian components including one emerging inside band-gap. Such inside band-gap band shows a clear dependence of the weighted intensity on the sizes of nanoparticles. Originated from our simplified one-dimensional (1D) model it has been qualitatively deduced that such size dependence match with the surface-state modified band structure. Additionally, a critical grain size as 110 nm for surface states recombination of ZnO nanoparticles has been found experimentally.

作者: Fuli Zhao Xiaofang Wang Pingbo Xie Ningsheng Xu Zhizhan Xu

作者单位: State Key Laboratory of Optoelectonic Materials and Technologies, Sun Yat-sen University, Guangzhou, College of Materials Science and Engineering, South China University of Technology, 510641, China

会议类型: 国际会议

会议名称: 2007年微纳系统集成及其商业化应用国际学术会议(2007 International Conference & Exhibition on Integration and Commercialization of Micro and Nano-Systems)

会议地点: 海南三亚

会议语种:英文

在线出版日期: 2007-01-10（万方平台首次上网日期，不代表论文的发表时间）