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tangcwk
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第 1 條，共 1 條 標(biāo)題: Reactivation of gallium nitride photocathode with cesium in a high vacuum system 作者: Fu, XQ (Fu, Xiaoqian); Zhang, JJ (Zhang, Junju) 來(lái)源出版物: OPTIK 卷: 124 期: 24 頁(yè): 7007-7009 DOI: 10.1016/j.ijleo.2013.07.004 出版年: 2013 Web of Science 核心合集中的 "被引頻次": 1 被引頻次合計(jì): 1 引用的參考文獻(xiàn)數(shù): 14 摘要: The degradation and reactivation characteristics of the originally activated GaN photocathode are explored by testing the change of quantum efficiency (QE). The QE after degradation for 9 h can still keep more than 42% of the original value, which indicates GaN photocathode has more robust stability characteristic than GaAs photocathode. Although the possible residue is not cleared up before we perform the reactivation with cesium, the QEs are almost recovered. The restorations of both the band bending and the ideal Cs/O ratio on the surface, along with the double dipole model are proposed to explain the QE variation during the original activation, degradation and reactivation of the GaN photocathode. Further exploration should include the roles played by the achievement of the maximum band bending of the GaN surface when deposited with Cs and its relationship with the surface Mg doping concentration. (C) 2013 Elsevier GmbH. All rights reserved. 入藏號(hào): WOS:000327685700113 語(yǔ)種: English 文獻(xiàn)類(lèi)型: Article 作者關(guān)鍵詞: Gallium nitride; Photocathode; Quantum efficiency; Reactivation; Dipole model 地址: [Fu, Xiaoqian] Univ Jinan, Sch Informat Sci & Engn, Shandong Prov Key Lab Network Based Intelligent C, Jinan 250022, Peoples R China. [Fu, Xiaoqian; Zhang, Junju] Nanjing Univ Sci & Technol, Inst Elect Engn & Optoelect Technol, Nanjing 210094, Jiangsu, Peoples R China. 通訊作者地址: Fu, XQ (通訊作者),Univ Jinan, Sch Informat Sci & Engn, Shandong Prov Key Lab Network Based Intelligent C, Jinan 250022, Peoples R China. 電子郵件地址: ise_fuxq@ujn.edu.cn 出版商: ELSEVIER GMBH, URBAN & FISCHER VERLAG 出版商地址: OFFICE JENA, P O BOX 100537, 07705 JENA, GERMANY Web of Science 類(lèi)別: Optics 研究方向: Optics IDS 號(hào): 261SU ISSN: 0030-4026 29 字符的來(lái)源出版物名稱(chēng)縮寫(xiě): OPTIK ISO 來(lái)源出版物縮寫(xiě): Optik 來(lái)源出版物頁(yè)碼計(jì)數(shù): 3 基金資助致謝: 基金資助機(jī)構(gòu) 授權(quán)號(hào) Natural Science Foundation of Shandong Province ZR2011FQ027 This work is supported by the Natural Science Foundation of Shandong Province (Grant No. ZR2011FQ027). |
2樓2015-07-28 08:31:50
tangcwk
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