Structural Features and Photoelectric Properties of Si-Doped GaAs under Gamma Irradiation
| Autor: | Xiao Tao Zu, Ye Shen, Ming Jiang, H.Y. Xiao, Xuan Fang, Gui Xia Yang, Xiang Ding, Liang Qiao, Xia Xiang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Photoluminescence
Materials science General Chemical Engineering photoelectric property 02 engineering and technology 01 natural sciences Article lcsh:Chemistry symbols.namesake 0103 physical sciences gaas General Materials Science Irradiation Radiation resistance 010302 applied physics business.industry gamma radiation Wide-bandgap semiconductor 021001 nanoscience & nanotechnology Blueshift Semiconductor lcsh:QD1-999 symbols Optoelectronics 0210 nano-technology Raman spectroscopy business Luminescence structural features |
| Zdroj: | Nanomaterials, Vol 10, Iss 2, p 340 (2020) Nanomaterials Volume 10 Issue 2 |
| ISSN: | 2079-4991 |
| Popis: | GaAs has been demonstrated to be a promising material for manufacturing semiconductor light-emitting devices and integrated circuits. It has been widely used in the field of aerospace, due to its high electron mobility and wide band gap. In this study, the structural and photoelectric characteristics of Si-doped GaAs under different gamma irradiation doses (0, 0.1, 1 and 10 KGy) are investigated. Surface morphology studies show roughen of the surface with irradiation. Appearance of transverse-optical (TO) phonon mode and blueshift of TO peak reflect the presence of internal strain with irradiation. The average strain has been measured to be 0.009 by Raman spectroscopy, indicating that the irradiated zone still has a good crystallinity even at a dose of 10 KGy. Photoluminescence intensity is increased by about 60% under 10 KGy gamma irradiation due to the strain suppression of nonradiative recombination centers. Furthermore, the current of Si-doped GaAs is reduced at 3V bias with the increasing gamma dose. This study demonstrates that the Si-doped GaAs has good radiation resistance under gamma irradiation, and appropriate level of gamma irradiation can be used to enhance the luminescence property of Si-doped GaAs. |
| Databáze: | OpenAIRE |
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