Answers are grounded in this paper and cite their sources.
Direct and indirect energy gaps of AlAs at 300°K, 3.14 and 2.14 eV, respectively, have been obtained from optical absorption measurements on vapor-grown single-crystalline specimens. The present direct-bandgap value is higher by about 0.2 eV than that previously reported, while the present indirect-bandgap value is in good agreement with a recent value. The optical measurements revealed, in addition to the direct and indirect absorption edges, the existence of an absorption peak due to nonstoichiometry.
No takes yet. Share an insight, caveat, or question.
Woosoon Yim (1971) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: