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The Kinetics of the Radiative and Nonradiative Processes in Nanocrystalline ZnO Particles upon Photoexcitation
Abstract
This report presents the results of steady-state and time-resolved luminescence measurements performed on suspensions of nanocrystalline ZnO particles of different sizes and at different temperatures. In all cases two emission bands are observed. One is an exciton emission band and the second an intense and broad visible emission band, shifted by approximately 1.5 eV with respect to the absorption onset. As the size of the particles increases, the intensity of the visible emission decreases while that of the exciton emission increases. As the temperature decreases, the relative intensity of the exciton emission increases. In accordance with the results presented in a previous paper, we assume that the visible emission is due to a transition of an electron from a level close to the conduction band edge to a deeply trapped hole in the bulk ( ) of the ZnO particle. The temperature dependence and size dependence of the ratio of the visible to exciton luminescence and the kinetics are explained by a model in which the photogenerated hole is transferred from the valence band to a level in the bulk of the particle in a two-step process. The first step of this process is an efficient surface trapping, probably at an O 2- site.
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Citations
Cited by
ZnO nanostructures for optoelectronics: Material properties and device applications
Djurišić, A. B., Ng, A. M. C., & Chen, X. Y. (2010) · Progress in Quantum Electronics · doi:10.1016/j.pquantelec.2010.04.001 · Cited by 1,078
Ag/ZnO Heterostructure Nanocrystals: Synthesis, Characterization, and Photocatalysis
Zheng, Y., Zheng, L., Zhan, Y., Lin, X., Zheng, Q., & Wei, K. (2007) · Inorganic Chemistry · doi:10.1021/ic700688f · Cited by 913
Djurišić, A. B., Leung, Y. H., Tam, K. H., Ding, L., Ge, W. K., Chen, H. Y., & Gwo, S. (2006) · Applied Physics Letters · doi:10.1063/1.2182096 · Cited by 579
High‐Performance Ultraviolet Photodetector Based on a Few‐Layered 2D NiPS3 Nanosheet
Chu, J., Wang, F., Yin, L., Lei, L., Yan, C., Wang, F., Wen, Y., Wang, Z., Jiang, C., Feng, L., et al. (2017) · Advanced Functional Materials · doi:10.1002/adfm.201701342 · Cited by 293
He, C., Sasaki, T., Usui, H., Shimizu, Y., & Koshizaki, N. (2007) · Journal of Photochemistry and Photobiology A: Chemistry · doi:10.1016/j.jphotochem.2007.04.006 · Cited by 65
Metadata
- Authors
- van Dijken, A., Meulenkamp, E. A., Vanmaekelbergh, D., & Meijerink, A.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2000-02-03
- Volume
- 104
- Issue
- 8
- Pages
- 1715-1723
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2314429368
- Cited by
- 878
- References
- 0
- FWCI
- 9.06
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: The Kinetics of the Radiative and Nonradiative Processes in Nanocrystalline ZnO Particles upon Photoexcitation. https://app.cochat.ai/papers/10.1021/jp993327z
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- van Dijken, A., Meulenkamp, E. A., Vanmaekelbergh, D., & Meijerink, A. (2000). The Kinetics of the Radiative and Nonradiative Processes in Nanocrystalline ZnO Particles upon Photoexcitation. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp993327z
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