Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524


J. Korean Phy. Soc. 2011; 58(5(1)): 1284-1289

Published online May 13, 2011

Copyright © The Korean Physical Society.

Effects of Laser Excitation Power and Temperature on the Emission Around 3.31 eV from ZnO Nanocrystals and Nanorods

S. S. Kurbanov, T. W. Kang


The photoluminescence (PL) from ZnO nanocrystals and nanorods has been investigated, paying particular attention to the emission around 3.31 eV (A-line). The temperature- and the excitationpower-dependent investigations revealed different intensity and peak energy variations of the A-line and bound (free) exciton emissions and a decrease in activation energy under high excitation power. In contrast to ZnO nanocrystals, a negative thermal quenching of the A-line intensity from ZnO nanorods was observed. The origin of the observations is discussed.

Keywords: ZnO, Photoluminescence, Activation energy,