Spatially resolved cathodoluminescence spectra of excitons in a ZnO microparticle
Takeshi HiraiOsaka Electro-Communication University 1 Academic Frontier Promotion Center, , 18-8 Hatsu-cho, Neyagawa, Osaka 572-8530, JapanNobuhito OhnoOsaka Electro-Communication University 1 Academic Frontier Promotion Center, , 18-8 Hatsu-cho, Neyagawa, Osaka 572-8530, JapanYoshiyuki HaradaOsaka Institute of Technology 2 Nanomaterials Microdevices Research Center, , Ohmiya, Asahi-ku, Osaka, Osaka 535-8585, JapanTaku HoriiOsaka University 3 Graduate School of Engineering Science, , 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, JapanYuji SawadaOsaka University 3 Graduate School of Engineering Science, , 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, JapanTadashi ItohOsaka University 3 Graduate School of Engineering Science, , 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan
2008en
ABI
Аннотация
Spatially resolved cathodoluminescence (CL) spectra of excitons in a ZnO microparticle, which consists of a number of small particles (primary particles), have been investigated at low temperature (15K). The spatially resolved CL spectra can be interpreted in terms of the influence of an internal electric field, which is likely caused by transfer of electrons from donor defects to surface states near the surface, on the radiative recombination of free and bound excitons in the ZnO microparticle.
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