Concepedia
Statistics
Publications
4
Citations
96
H-Index
Active since
1974
W. M. Callahan is an author specializing in engineering, materials science, and materials engineering.
Publications per year
1974–1978
High-performance solar cell material: <i>n</i>-AlAs/<i>p</i>-GaAs prepared by vapor phase epitaxy
W. D. Johnston, W. M. Callahan · Applied Physics Letters · 1976 · 53 citations
Engineering, Materials Engineering, Materials Science +16
VPE Growth of n ‐ AlAs on GaAs for Heterojunction Devices
W. D. Johnston, W. M. Callahan · Journal of The Electrochemical Society · 1976 · 16 citations
Observation of dark-line degradation sites in AlGaAs/GaAs DH laser material by etching and phase-contrast microscopy
W. D. Johnston, W. M. Callahan, B.I. Miller · Journal of Applied Physics · 1974 · 16 citations
Engineering, Materials Engineering, Materials Science +17
Properties of Polycrystalline AlAs / GaAs on Graphite Heterojunctions for Solar Cell Applications
W. D. Johnston, W. M. Callahan · Journal of The Electrochemical Society · 1978 · 11 citations · Full text
1–4 of 4