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题名: Study on photoluminescence properties of 1.05 eV InGaAsP layers grown by molecular beam epitaxy
作者: Yang, WX(杨文献); Ji, L(季莲); Dai, P(代盼); Tan, M(谭明); Wu, YY(吴渊源); Lu, JY(卢建娅); Li, BJ(李宝吉); Gu, J(顾俊); Lu, SL(陆书龙); Ma, ZQ
通讯作者: Lu, SL (陆书龙)
关键词: InGaAsP ; molecular beam epitaxy ; photoluminescence ; carrier luminescence relaxation time
刊名: ACTA PHYSICA SINICA
发表日期: 2015
DOI: 10.7498/aps.64.177802
卷: 64, 期:17, 页:7
收录类别: SCI
部门归属: 纳米器件及相关材料研究部
英文摘要: The photoluminescence properties of InGaAsP films with a bandgap energy of 1.05 eV for quadruple-junction solar cells grown by molecular beam epitaxy (MBE) are investigated. We make the excitation intensity and temperature dependence of continuous-wave photoluminescence (cw-PL) measurements. The PL peak position is 1.1 eV at 10 K, and almost independent of the excitation power, but the integrated intensity of the PL emission peaks is roughly proportional to the excitation power. The shift of peak position with temperature follows the band gap shrinking predicted by the well-known Varshni's empirical formula. These results indicate that the intrinsic transition dominates the light emission of the InGaAsP material. In addition, we also make the time-resolved photoluminescence (TRPL) measurements to determine the carrier luminescence relaxation time in InGaAsP. PL spectra suggest that the relaxation time is 10.4 ns at room temperature and increases with increasing excitation power, which demonstrates the high quality of the InGaAsP material. However, the relaxation time shows an S-shape variation with increasing temperature: it increases at temperatures lower than 50 K, and then decreases between 50 150 K, and increases again when temperature is over 150 K. According to the effect of temperature and the non-radiative recombination center concentration on the carrier relaxation time, the recombination mechanism of S-shape variation can be explained by the carrier relaxation dynamics.
语种: 英语
JCR小类分区: 四区
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内容类型: 期刊论文
URI标识: http://ir.sinano.ac.cn/handle/332007/3315
Appears in Collections:纳米器件及相关材料研究部_SONY团队_期刊论文

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Recommended Citation:
Yang, WX,Ji, L,Dai, P,et al. Study on photoluminescence properties of 1.05 eV InGaAsP layers grown by molecular beam epitaxy[J]. ACTA PHYSICA SINICA,2015,64(17):7.
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