Formation Dynamics of Excitons and Temporal Behaviors of Fano Resonance Due to the Exciton–Impurity–Phonon Configuration Interaction in ZnO

Formation Dynamics of Excitons and Temporal Behaviors of Fano Resonance Due to the Exciton–Impurity–Phonon Configuration Interaction in ZnO

Formation dynamics of free and neutral donor bound excitons (FX and D0X) in a high quality ZnO single crystal are studied by means of time-resolved photoluminescence (TRPL) at various temperatures. At low-temperatures, FX and D0X formation times are determined to be ∼5 and ∼10 ps, respectively, by f...

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Veröffentlicht in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2012-01, Vol.116 (1), p.381-385
Hauptverfasser: Zheng, C. C, Xu, S. J, Ning, J. Q, Chen, Y. N, Li, B. K, Wang, J. N, Che, C. M
Format: Artikel
Sprache:eng
Schlagworte:
A: Kinetics, Spectroscopy
Configuration interaction
Dynamics
Excitation
Excitons
Fittings
Formations
Temporal logic
Zinc oxide
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Zusammenfassung:Formation dynamics of free and neutral donor bound excitons (FX and D0X) in a high quality ZnO single crystal are studied by means of time-resolved photoluminescence (TRPL) at various temperatures. At low-temperatures, FX and D0X formation times are determined to be ∼5 and ∼10 ps, respectively, by fitting the rise process with the Boltzmann sigmoidal function. Temporal information of FX- and D0X-longitudinal optical (LO) phonon coupling is also acquired by measuring TRPL spectra of the first-order LO phonon-assisted FX and D0X transitions. In particular, interesting time evolution of luminescence intensity in the Fano resonance region due to the configuration interaction of exciton–impurity–phonon is explored.
ISSN:1089-5639
1520-5215
DOI:10.1021/jp209919n