Correlation between grain size and optical properties in zinc oxide thin films
Takahiro MatsumotoResearch and Development Center, Stanley Electric Corporation, 1-3-1 Eda-Nishi, Aoba Yokohama 225-0014, JapanHiroyuki KatoResearch and Development Center, Stanley Electric Corporation, 1-3-1 Eda-Nishi, Aoba Yokohama 225-0014, JapanKazuhiro MiyamotoResearch and Development Center, Stanley Electric Corporation, 1-3-1 Eda-Nishi, Aoba Yokohama 225-0014, JapanM. SanoResearch and Development Center, Stanley Electric Corporation, 1-3-1 Eda-Nishi, Aoba Yokohama 225-0014, JapanEvgeniy Andreevich ZhukovResearch and Development Center, Stanley Electric Corporation, 1-3-1 Eda-Nishi, Aoba Yokohama 225-0014, JapanTakafumi YaoInstitute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan
2002en
ABI
Аннотация
Photoluminescence (PL) and time-resolved PL spectra of zinc oxide (ZnO) films were investigated as a function of the grain size of the microcrystals. Correlation was found between the grain size and the optical properties—in the bound exciton states, both the PL intensity and PL decay time increased with increasing the grain size. This correlation can be well explained by the existence of nonradiative-surface and/or -interface states in the grain boundaries of ZnO microcrystals.
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