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为获得对In0.53Ga0.47As/InP材料在电子束辐照下的光致发光谱变化规律, 开展了1 MeV电子束辐照试验, 注量为 5×1012-9×1014 cm-2. 样品选取量子阱材料和体材料, 在辐照前后, 进行了光致发光谱测试, 得到了不同结构In0.53Ga0.47As/InP材料在1 MeV电子束辐照下的不同变化规律; 对比分析了参数退化的物理机理. 结果显示: 试验样品的光致发光峰强度随着辐照剂量增大而显著退化. 体材料最先出现快速退化, 而五层量子阱在注量达到6×1014 cm-2时, 就已经退化至辐照前的9%. 经分析认为原因有: 1)电子束进入样品后, 与材料晶格发生能量传递, 破坏晶格完整性, 致使产生的激子数量减少, 光致发光强度降低; 电子束辐照在材料中引入缺陷, 增加了非辐射复合中心密度, 导致载流子迁移率降低. 2)量子阱的二维限制作用使载流子运动受限, 从而能够降低载流子与非辐射复合中心的复合概率; 敏感区域截面积相同条件下, 体材料比量子阱材料辐射损伤更为严重. 3)量子阱的层数越多, 则异质结界面数越多, 相应的产生的界面缺陷数量也随之增多, 辐射损伤越严重.
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关键词:
- In0.53Ga0.47As/InP /
- 量子阱 /
- 电子束辐照 /
- 光致发光谱
Minimizing the impact of radiation-induced degradation on optoelectronic devices is important in several applications. Satellites and other spacecraft that fly in near-earth orbits (below 3.8 earth radius) are extremely susceptible to radiation damage caused by the high flux of electrons trapped in the earth’s magnetosphere. Optoelectronic devices are particularly vulnerable to displacement damage caused by electrons and protons. Effects of 1 MeV electron beam irradiation on the photoluminescence properties of In0.53Ga0.47As/InP quantum well (QW) and bulk structures, which are grown by metal-organic vapor phase epitaxy, are investigated. Samples are irradiated at room temperature using an ELV-8II accelerator with 1 MeV electron at doses ranging from 5×1012 to 9×1014 cm-2, and a dose rate of 1.075×1010 cm-2·s-1. Photoluminescence measurements are made using a 532 nm laser for excitation and a cooled Ge detector with lock-in techniques for signal detection. Photoluminescence intensity of all the structures is degraded after irradiation, and its reduction increases with increasing total dose of irradiation. Electron beam irradiation causes a larger reduction in the photoluminescence intensity and carrier lifetime of the bulk than that of quantum well. Photoluminescence intensity of five-layer quantum wells degenerates to 9% that before irradiation as the fluence reaches 6×1014 cm-2. As the electron beams bombard into the sample, the destruction of the lattice integrity will cause the decrease in the number of excitons and intensity of photoluminescence. Electron beam irradiation introduces defects in the samples, increases the density of the nonradiative recombination centers, and results in the decrease of carrier mobility. In a quantum well structure, due to the two-dimensional confinement, the probability of carrier nonradiative recombination at radiation-induced defect centers will be reduced. The reduction of photoluminescence intensity in the bulk is severer than in the quantum well while the cross-sectional area which is sensitive to radiation is kept the same. The number of interface defects which are produced by electron irradiation will increase with the number of layers in quantum well and the heterojunction interface of quantum wells, so is the degration of photoluminescence intensity. The degration is mainly due to the increase of non-radiative centers in the samples. By comparing the different structures, the quantum well structure shows a better radiation resistance.-
Keywords:
- In0.53Ga0.47As/InP /
- quantum well /
- electron beam irradiation /
- photoluminescence
[1] Zhang Z Y, Wang Z G, Xu B, Jin P, Sun Z Z, Liu F Q 2004 IEEE Photonics Technol. Lett. 16 27
[2] Temkin H, Dutta N K, Tanbun Ek T, Logan R A, Sergent A M 1990 Applied physics letters 57 1610
[3] Wake D, Walling R H, Sargood S K, Henning I D 1987 Electronics Letters 23 415
[4] Xing J L, Zhang Y, Xu Y Q, Wang G W, Wang J, Xiang W, Ni H Q, Ren Z W, He Z H, Niu Z C 2014 Chin. Phys. B 23 017805
[5] Li C, Xue C L, Li C B, Liu Z, Cheng B W, Wang Q M 2013 Chinese Phys. B 22 118503
[6] Leon R, Swift G M, Magness B, Taylor W A, Tang Y S, Wang K L, Dowd P, Zhang Y H 2000 Applied Physics Letters 76 2074
[7] Aierken A, Guo Q, Huhtio T, Sopanen M, He C F, Li Y D, Wen L, Ren D Y 2013 Radiation Physics and Chemistry 83 42
[8] Guffarth F, Heitz R, Geller M, Kapteyn C, Born H, Sellin R, Hoffmann A, Bimberg D, Sobolev N A, Carmo M C 2003 Applied Phys. Lett. 82 1941
[9] Che C, Liu Q F, Ma J, Zhou Y P 2012 Acta Phys. Sin. 62 094219 (in Chinese) [车驰, 柳青峰, 马晶, 周彦平 2012 物理学报 62 094219]
[10] Ma J, Che C, Han Q Q, Zhou Y P, Tan L Y 2012 Acta Phys. Sin. 61 214211 (in Chinese) [马晶, 车驰, 韩琦琦, 周彦平, 谭立英 2012 物理学报 61 214211]
[11] Zhou Y P, Hao N, Yang R, Che C, Jin H, Xu J 2013 Infrared and Laser Engineering 42 454 (in Chinese) [周彦平, 郝娜, 杨瑞, 车驰, 靳浩, 徐静 2013 红外与激光工程 42 454]
[12] Zou R, Lin L B 2002 Research & Progress of SSE. 22 404 (in Chinese) [邹睿, 林理彬 2002 固体电子学研究与进展 22 404]
[13] Zhang M, Lin L B, Zou R, Zhang G Q, Li Y G 2003 Chinese Journal of Lasers 7 004 (in Chinese) [张猛, 林理彬, 邹睿, 张国庆, 李永贵 2003 中国激光 7 004]
[14] Haug H, Schmitt-Rink S 1984 Progress in Quantum Electronics 9 3
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[1] Zhang Z Y, Wang Z G, Xu B, Jin P, Sun Z Z, Liu F Q 2004 IEEE Photonics Technol. Lett. 16 27
[2] Temkin H, Dutta N K, Tanbun Ek T, Logan R A, Sergent A M 1990 Applied physics letters 57 1610
[3] Wake D, Walling R H, Sargood S K, Henning I D 1987 Electronics Letters 23 415
[4] Xing J L, Zhang Y, Xu Y Q, Wang G W, Wang J, Xiang W, Ni H Q, Ren Z W, He Z H, Niu Z C 2014 Chin. Phys. B 23 017805
[5] Li C, Xue C L, Li C B, Liu Z, Cheng B W, Wang Q M 2013 Chinese Phys. B 22 118503
[6] Leon R, Swift G M, Magness B, Taylor W A, Tang Y S, Wang K L, Dowd P, Zhang Y H 2000 Applied Physics Letters 76 2074
[7] Aierken A, Guo Q, Huhtio T, Sopanen M, He C F, Li Y D, Wen L, Ren D Y 2013 Radiation Physics and Chemistry 83 42
[8] Guffarth F, Heitz R, Geller M, Kapteyn C, Born H, Sellin R, Hoffmann A, Bimberg D, Sobolev N A, Carmo M C 2003 Applied Phys. Lett. 82 1941
[9] Che C, Liu Q F, Ma J, Zhou Y P 2012 Acta Phys. Sin. 62 094219 (in Chinese) [车驰, 柳青峰, 马晶, 周彦平 2012 物理学报 62 094219]
[10] Ma J, Che C, Han Q Q, Zhou Y P, Tan L Y 2012 Acta Phys. Sin. 61 214211 (in Chinese) [马晶, 车驰, 韩琦琦, 周彦平, 谭立英 2012 物理学报 61 214211]
[11] Zhou Y P, Hao N, Yang R, Che C, Jin H, Xu J 2013 Infrared and Laser Engineering 42 454 (in Chinese) [周彦平, 郝娜, 杨瑞, 车驰, 靳浩, 徐静 2013 红外与激光工程 42 454]
[12] Zou R, Lin L B 2002 Research & Progress of SSE. 22 404 (in Chinese) [邹睿, 林理彬 2002 固体电子学研究与进展 22 404]
[13] Zhang M, Lin L B, Zou R, Zhang G Q, Li Y G 2003 Chinese Journal of Lasers 7 004 (in Chinese) [张猛, 林理彬, 邹睿, 张国庆, 李永贵 2003 中国激光 7 004]
[14] Haug H, Schmitt-Rink S 1984 Progress in Quantum Electronics 9 3
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