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Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/17366

Title: Surface Band Bending, Nitrogen-vacancy-related Defects, and 2.8-eV Photoluminescence Band of (NH4)�2Sx-treated p-GaN
Authors: Lin, Yow-Jon;Wang, Zhi-Long;Chang, Hsing-Cheng
Contributors: 光電科技研究所
Keywords: Gallium compounds;Surface treatment;Surface states;Photoluminescence;X-ray photoelectron spectra;III-V semiconductors;Wide band gap semiconductors;Vacancies (crystal);Core levels;Ohmic contacts;Schottky barriers;Semiconductor-metal boundaries
Date: 2002-12
Issue Date: 2013-10-02T08:35:48Z
Publisher: American Institute of Physics
Abstract: We have employed the photoluminescence and x-ray photoelectron spectroscopy measurements to study the effects of (NH4)2Sx treatment on the p-type GaN (p-GaN). After (NH4)2Sx treatment, we found that the reduction of the surface state, related to nitrogen-vacancy defects on the p-GaN surface, led to a reduction in surface band bending by 0.25 eV. The surface band bending reduction and surface state reduction caused by the (NH4)2Sx surface treatment could be useful for the formation of ohmic and Schottky contacts between the metal and p-GaN layers. In addition, the intensity of the 2.8-eV photoluminescence band depended on the amount of nitrogen vacancy of p-GaN, which was also investigated in this study.
Relation: Applied Physics Letters, 81(27): 5183-5185
Appears in Collections:[光電科技研究所] 期刊論文

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