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Influence of annealing temperature on the structural and optical properties of sol–gel prepared ZnO thin films
Author(s) -
Wang Mingsong,
Kim Eui Jung,
Chung Jin Suk,
Shin Eun Woo,
Hahn Sung Hong,
Lee Ka Eun,
Park Chinho
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200521398
Subject(s) - wurtzite crystal structure , annealing (glass) , crystallite , materials science , thin film , sol gel , amorphous solid , zinc , chemical engineering , band gap , optoelectronics , composite material , nanotechnology , crystallography , metallurgy , chemistry , engineering
Zinc oxide thin films have been prepared via a sol–gel process. The influence of annealing temperature on the structural and optical properties of the ZnO thin films has been investigated. The prepared ZnO thin films had a polycrystalline hexagonal wurtzite structure with no preferred orientation. The annealing temperature had a great effect on the optical properties of the ZnO thin films: the optical band gap became narrow due to the increase in crystallite size and the reduction in amorphous phase amount with increasing annealing temperature. Absorption or desorption of oxygen in the annealing process caused the observed yellow or green emission. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)