TIME-RESOLVED PHOTOLUMINESCENCE OF SINTERED ZnO CERAMICS
Wen Xiao-ming (文小明)ab, N. Ohnob, Zhang Zhong-ming (张中明)a
a Department of Physics, Yunnan University, Kunming 650091, China; b Academic Frontier Promotion Center, Osaka Electro-Communication University, Neyagawa, Osaka 572-8530, Japan
Abstract The time-resolved photoluminescence (TRPL) of sintered ZnO ceramics was measured at low temperatures. A broad luminescence band was observed in the visible region. The TRPL experiment shows that photoluminescence decay behaviour can be depicted as t-n(r). The decay rate n(r) and lifetime are wavelength dependent, and the former varies exponentially with wavelength. The power-lowering behaviour of the luminescence intensity indicates that the luminescence band originates from the recombination of donor-acceptor pairs.
Received: 07 March 2001
Revised: 20 May 2001
Accepted manuscript online:
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