TITLE

Hydrogen-induced improvements in optical quality of GaNAs alloys

AUTHOR(S)
Buyanova, I. A.; Izadifard, M.; Chen, W. M.; Polimeni, A.; Capizzi, M.; Xin, H. P.; Tu, C. W.
PUB. DATE
May 2003
SOURCE
Applied Physics Letters;5/26/2003, Vol. 82 Issue 21, p3662
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Strong suppression of potential fluctuations in the band edges of GaNAs alloys due to postgrowth hydrogen treatment, which is accompanied by a reopening of the alloy band gap, is revealed from temperature-dependent photoluminescence (PL) and PL excitation measurements. The effect likely indicates preferential trapping of hydrogen near the lattice sites with the highest nitrogen content. A remarkable improvement in the radiative efficiency of the alloys at room temperature is also demonstrated and is ascribed to efficient hydrogen passivation of competing nonradiative centers.
ACCESSION #
9815630

 

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