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Proceedings Paper

Studying of linearly graded buffer layer effect on quality of InGaAs on GaAs substrate
Author(s): Gangcheng Jiao; Zhengtang Liu; Feng Shi; Liandong Zhang; Wei Cheng; Shufei Wang; Yujian Zhou
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Paper Abstract

There has been extensive applcations in the area of photoelectronic device because InGaAs grown on the GaAs substrate have advantageous photoelectronic performance and adjustable band gap. The main obstacle to acquiring high crystalline quality of InGaAs grown on GaAs substrate comes from the large lattice mismatch between InGaAs overlayer and GaAs substrate. It is particularly detrimental to the structure and photoelectronic property of InGaAs thin films that lager roughness of surface and high misfit dislocation density is introduced because of the defect onset during the growth. The In0.1Ga0.9As layers with and without linearly graded buffer layers grown on GaAs substrate had been studied. The investigations were performed by applying atomic force microscopy (AFM), high resolution X-ray diffractometry (HR XRD). A linearly graded buffer layer is effective for lowering the misfit dislocation density in In0.1Ga0.9As layers on a GaAs substrate, but it can not end the dislocation in buffer layer completely. All above-mentioned is also confirmed in HRXRD results.

Paper Details

Date Published: 15 October 2012
PDF: 6 pages
Proc. SPIE 8419, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing, Imaging, and Solar Energy, 84192Z (15 October 2012); doi: 10.1117/12.977611
Show Author Affiliations
Gangcheng Jiao, Northwestern Polytechnical Univ. (China)
Xi'an Institute of Applied Optics (China)
North Night Vision Technology Group Co., Ltd. (China)
Zhengtang Liu, Northwestern Polytechnical Univ. (China)
Feng Shi, Xi'an Institute of Applied Optics (China)
North Night Vision Technology Group Co., Ltd. (China)
Liandong Zhang, Xi'an Institute of Applied Optics (China)
North Night Vision Technology Group Co., Ltd. (China)
Wei Cheng, Xi'an Institute of Applied Optics (China)
North Night Vision Technology Group Co., Ltd. (China)
Shufei Wang, Xi'an Institute of Applied Optics (China)
North Night Vision Technology Group Co., Ltd. (China)
Yujian Zhou, Xi'an Institute of Applied Optics (China)
North Night Vision Technology Group Co., Ltd. (China)


Published in SPIE Proceedings Vol. 8419:
6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing, Imaging, and Solar Energy
Yadong Jiang; Junsheng Yu; Zhifeng Wang, Editor(s)

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