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tangcwk
ÈÙÓþ°æÖ÷ (ÎÄ̳¾«Ó¢)
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duckyfu(sunshan4379´ú·¢): ½ð±Ò+5 2015-08-03 13:09:17
sunshan4379: LS-EPI+1, ¸ÐлӦÖú 2015-08-03 13:09:31
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duckyfu(sunshan4379´ú·¢): ½ð±Ò+5 2015-08-03 13:09:17
sunshan4379: LS-EPI+1, ¸ÐлӦÖú 2015-08-03 13:09:31
|
µÚ 1 Ìõ£¬¹² 1 Ìõ ±êÌâ: Reactivation of gallium nitride photocathode with cesium in a high vacuum system ×÷Õß: Fu, XQ (Fu, Xiaoqian); Zhang, JJ (Zhang, Junju) À´Ô´³ö°æÎï: OPTIK ¾í: 124 ÆÚ: 24 Ò³: 7007-7009 DOI: 10.1016/j.ijleo.2013.07.004 ³ö°æÄê: 2013 Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 1 ±»ÒýƵ´ÎºÏ¼Æ: 1 ÒýÓõIJο¼ÎÄÏ×Êý: 14 ÕªÒª: 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. Èë²ØºÅ: WOS:000327685700113 ÓïÖÖ: English ÎÄÏ×ÀàÐÍ: Article ×÷Õ߹ؼü´Ê: Gallium nitride; Photocathode; Quantum efficiency; Reactivation; Dipole model µØÖ·: [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. ͨѶ×÷ÕßµØÖ·: Fu, XQ (ͨѶ×÷Õß),Univ Jinan, Sch Informat Sci & Engn, Shandong Prov Key Lab Network Based Intelligent C, Jinan 250022, Peoples R China. µç×ÓÓʼþµØÖ·: ise_fuxq@ujn.edu.cn ³ö°æÉÌ: ELSEVIER GMBH, URBAN & FISCHER VERLAG ³ö°æÉ̵ØÖ·: OFFICE JENA, P O BOX 100537, 07705 JENA, GERMANY Web of Science Àà±ð: Optics Ñо¿·½Ïò: Optics IDS ºÅ: 261SU ISSN: 0030-4026 29 ×Ö·ûµÄÀ´Ô´³ö°æÎïÃû³ÆËõд: OPTIK ISO À´Ô´³ö°æÎïËõд: Optik À´Ô´³ö°æÎïÒ³Âë¼ÆÊý: 3 »ù½ð×ÊÖúÖÂл: »ù½ð×ÊÖú»ú¹¹ ÊÚȨºÅ Natural Science Foundation of Shandong Province ZR2011FQ027 This work is supported by the Natural Science Foundation of Shandong Province (Grant No. ZR2011FQ027). |

2Â¥2015-07-28 08:31:50
tangcwk
ÈÙÓþ°æÖ÷ (ÎÄ̳¾«Ó¢)
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ר¼Ò¾Ñé: +373 - Ó¦Öú: 236 (´óѧÉú)
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3Â¥2015-07-28 08:32:08









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