Effect of growth rate on the band gap of Ga0.5In0.5P
作者:
Sarah R. Kurtz,
J. M. Olson,
A. Kibbler,
期刊:
Applied Physics Letters
(AIP Available online 1990)
卷期:
Volume 57,
issue 18
页码: 1922-1924
ISSN:0003-6951
年代: 1990
DOI:10.1063/1.104013
出版商: AIP
数据来源: AIP
摘要:
The band gap of Ga0.5In0.5P is reported as a function of growth rate and growth temperature. The Ga0.5In0.5P is grown lattice matched to 2°‐off (100) GaAs substrates by atmospheric pressure organometallic chemical vapor deposition using an inlet group V/III ratio of 65. The variation of the band gap is surprisingly complex, taking five different functional forms within the two‐dimensional parameter space. These include regions in which the band gap (1) increases with growth rate, (2) decreases with growth rate, (3) is independent of both growth rate and temperature, (4) is independent of growth rate, but dependent on growth temperature, and (5) is not measurable since three‐dimensional, instead of two‐dimensional, growth is observed. The behavior can only be explained by a theory involving competing processes. One such theory is described.
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