NDLI: Impact of annealing and V:III ratio on properties of MBE grown wide-bandgap AlGaInP materials and solar cells

Content Provider	IEEE Xplore Digital Library
Author	Lueck, M. Gonzalez, M. Ojin Kwon Andre, C. Ringel, S.A.
Copyright Year	2005
Description	Author affiliation: Ohio State Univ., Columbus, OH, USA (Lueck, M.; Gonzalez, M.; Ojin Kwon; Andre, C.; Ringel, S.A.)
Abstract	The growth and properties of wide bandgap (Al/sub x/Ga/sub 1-x/)/sub 0.51/In/sub 0.49/P layers and solar cells grown by solid source molecular beam epitaxy were examined to correlate the impact of growth conditions and in-situ annealing on photovoltaic performance. A P/sub 2/:III flux ratio of 12 was found to optimize the optical qualities of Ga/sub 0.51/In/sub 0.49/P epilayers. Ga/sub 0.51/In/sub 0.49/P solar cells were grown and subjected to different in-situ annealing conditions. The effect of annealing on material quality and device performance was characterized through deep level transient spectroscopy (DLTS) and photoluminescence (PL), which revealed a trend in non-radiative recombination. The results suggest that removal of a deep level near E/sub C/ - 0.78 eV in the n-type base is responsible for the observed improvement in current collection seen after anneal. After refinement of the Ga/sub 0.51/In/sub 0.49/P growth, wider bandgap material was investigated for future use in a high temperature/high intensity solar cell. A range of (Al/sub x/Ga/sub 1-x/)/sub 0.51/In/sub 0.49/P materials, with direct bandgaps from 2.09 eV to 2.26 eV have been successfully demonstrated using digital alloying and conventional bulk growth.
Sponsorship	IEEE Electron Devices Soc. (USA)
Starting Page	711
Ending Page	714
File Size	785031
Page Count	4
File Format	PDF
ISBN	0780387074
ISSN	01608371
DOI	10.1109/PVSC.2005.1488230
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-01-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Annealing Photovoltaic cells Photonic band gap Molecular beam epitaxial growth Solids Photovoltaic systems Solar power generation Optical materials Spectroscopy Photoluminescence
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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