Photoexcited carrier recombination in wide m-plane InGaN/GaN quantum wells

被引:46
作者
Marcinkevicius, S. [1 ]
Kelchner, K. M. [2 ]
Kuritzky, L. Y. [2 ]
Nakamura, S. [2 ]
DenBaars, S. P. [2 ]
Speck, J. S. [2 ]
机构
[1] KTH Royal Inst Technol, Dept Mat & Nanophys, S-16440 Kista, Sweden
[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA
关键词
YELLOW LUMINESCENCE; RADIATIVE LIFETIME; GALLIUM VACANCIES; GAN; PHOTOLUMINESCENCE; NONPOLAR; DEFECTS;
D O I
10.1063/1.4820839
中图分类号
O59 [应用物理学];
学科分类号
摘要
Carrier recombination in single 10 nm wide m-plane homoepitaxial In0.15Ga0.85N/GaN quantum wells was examined by time-resolved photoluminescence. The radiative recombination time at 3.5 K was found to be short, about 0.5 ns. This value and the single-exponential luminescence decay show that the localized exciton recombination is not affected by the in-plane electric field. At room temperature, the nonradiative recombination was prevalent. The data indicate that the nonradiative recombination proceeds via efficient recombination centers. Complexes of Ga vacancies with oxygen and/or related interface defects are suggested to play this role and thus provide a direction for future improvements in materials' quality. (C) 2013 AIP Publishing LLC.
引用
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页数:5
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