Spatially resolved photoluminescence in partially ordered GaInP2

被引:20
作者
Smith, S [1 ]
Cheong, HM [1 ]
Fluegel, BD [1 ]
Geisz, JF [1 ]
Olson, JM [1 ]
Kazmerski, LL [1 ]
Mascarenhas, A [1 ]
机构
[1] Natl Renewable Energy Lab, Golden, CO 80401 USA
关键词
D O I
10.1063/1.123189
中图分类号
O59 [应用物理学];
学科分类号
摘要
Scanning confocal microscopy combined with high-resolution spectroscopy is used to probe the spatial variations in the low-temperature (5.0 K) photoluminescence (PL) of partially ordered GaInP2 with a spatial resolution of 0.7 mu m. We observe large regions (1-2 mu m) wherein the excitonic PL is suppressed up to a factor of four ("defect- rich" regions) when compared to unaffected areas. These defect-rich regions show a commensurate enhancement in the lower energy below gap emission. The spatial extent of this effect is inconsistent with the picture that the low-energy emission originates solely at the antiphase boundaries of the ordered domains and therefore must originate from other defects within the ordered domain as well. (C) 1999 American Institute of Physics. [S0003-6951(99)02005-7].
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页码:706 / 708
页数:3
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