Photoluminescence characteristics of undoped and terbium chloride doped zinc oxide films deposited by spray pyrolysis
作者:
C. Falcony,
A. Ortiz,
M. Garci´a,
J. S. Helman,
期刊:
Journal of Applied Physics
(AIP Available online 1988)
卷期:
Volume 63,
issue 7
页码: 2378-2381
ISSN:0021-8979
年代: 1988
DOI:10.1063/1.341055
出版商: AIP
数据来源: AIP
摘要:
The photoluminescence characteristics of undoped and TbCl3‐doped zinc oxide films deposited by the spray pyrolysis technique are reported. Undoped films present the characteristic blue‐green emission peak at ∼508 nm observed in single‐crystal and powder ZnO. The TbCl3‐doped films present a luminescence peak at ∼540 nm. The light emission of the doped films decreases with time of exposure of the sample to the excitation light. The phenomenon is interpreted in terms of a simple model in which a competitive process of hole trapping and phototrapping occurs at a radiative recombination center generated by the TbCl3.
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