Exciton radiative lifetime in ZnO nanorods fabricated by vapor phase transport method

X. H. Zhang, S. J. Chua, A. M. Yong, H. Y. Yang, Shu Ping Lau, Siu Fung Yu, X. W. Sun, Lei Miao, Masaki Tanemura, Sakae Tanemura

Research output: Journal article publicationJournal articleAcademic researchpeer-review

73 Citations (Scopus)

Abstract

The exciton radiative lifetime in ZnO nanorods is studied. It is found that the exciton radiative lifetime increases with temperature as T2. Furthermore, the spectral linewidth of the photoluminescence of the ZnO nanorods also increases with temperature as T2, suggesting a linear dependence of exciton radiative lifetime on the spectral linewidth. The physics behind is that the oscillator strength of excitons at k=0 is shared equally among all the states within the spectral linewidth and the coherence extension of an exciton decreases with temperature due to the scattering by phonons, defects, or impurities.
Original languageEnglish
Article number013107
JournalApplied Physics Letters
Volume90
Issue number1
DOIs
Publication statusPublished - 15 Jan 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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