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Band‐gap modification and tunable blue luminescence of wurtzite Mg x Zn 1– x O thin films
Author(s) -
Ogawa Yusuke,
Fujihara Shinobu
Publication year - 2005
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.200520053
Subject(s) - wurtzite crystal structure , oxidizing agent , luminescence , band gap , thin film , materials science , zinc , analytical chemistry (journal) , chemistry , nanotechnology , optoelectronics , metallurgy , environmental chemistry , organic chemistry
We have demonstrated that sol–gel‐derived wurtzite‐type Mg x Zn 1– x O films can exhibit reproducible blue emissions after heat treatments in a reducing atmosphere. Furthermore, the emission colors could be finely tuned by changing the Mg content x and band‐gap values. In contrast, the films showed orange emissions when they were heated in an oxidizing atmosphere. Our results then provided new insight into the mechanism of the visible emissions of ZnO. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)