Spontaneous polarization effects on the optical properties of AlGaN/InGaN/GaN quantum wells

被引:0
|
作者
Peng, LH [1 ]
Hsu, KT [1 ]
Shih, CW [1 ]
Chuo, CC [1 ]
Chyi, JI [1 ]
机构
[1] Natl Taiwan Univ, Inst Electroopt Engn, Taipei 106, Taiwan
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中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Large spectral red shifting (similar to140 meV) and reduced radiative recombination efficiency are observed on the high excitation luminescence spectra of InGaN/GaN quantum wells capped with a AlGaN top barrier compared with that of a GaN cap layer. These observations are ascribed to the additive internal field effect due to the spontaneous polarization induced volume charge at the AlGaN/InGaN interface.
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页码:36 / 37
页数:2
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