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Spectral behavior of the emission around 3.31 eV (A-line) from ZnO nanocrystals
Authors:S.S. Kurbanov  T.W. Kang
Affiliation:a Quantum-Functional Semiconductor Research Center, Dongguk University, Seoul 100715, Republic of Korea
b Heat Physics Department, Uzbekistan Academy of Sciences, Tashkent 700135, Uzbekistan
Abstract:The emission at around 3.31 eV (A-line) from three types of ZnO nanocrystals with different particle sizes (10-1000 nm) was studied. The photoluminescence (PL) measurements were performed under different excitation densities and at different temperatures. The A-line emission exhibited a strong dependence on temperature and excitation power density. With increasing excitation density and temperature overlapping of the closely spaced first longitudinal optical (LO) phonon replica of free excitons by the A-line emission was observed.
Keywords:Photoluminescence   ZnO   Nanocrystals
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