Please wait a minute...
Chin. Phys. B, 2009, Vol. 18(10): 4541-4546    DOI: 10.1088/1674-1056/18/10/074
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Distribution of carriers in gradient-doping transmission-mode GaAs photocathodes grown by molecular beam epitaxy

Zhang Yi-Jun(张益军), Chang Ben-Kang(常本康), Yang Zhi(杨智), Niu Jun(牛军), and Zou Ji-Jun(邹继军)
Institute of Electronic Engineering and Optoelectronic Technology, Nanjing University of Science and Technology, Nanjing 210094, China
Abstract  The gradient-doping structure is first applied to prepare the transmission-mode GaAs photocathode and the integral sensitivity of the sealed image tube achieves 1420 μA/lm. This paper studies the inner carrier concentration distribution of the gradient-doping transmission-mode GaAs photocathode after molecular beam epitaxy (MBE) growth using the electrochemical capacitance-voltage profiling. The results show that an ideal gradient-doping structure can be obtained by using MBE growth. The total band-bending energy in the gradient-doping GaAs active-layer with doping concentration ranging from 1× 10 19 cm-3 to 1×1018 cm-3 is calculated to be 46.3 meV, which helps to improve the photoexcited electrons movement toward surface for the thin epilayer. In addition, by analysis of the band offsets, it is found that the worse carrier concentration discrepancy between GaAs and GaAlAs causes a lower back interface electron potential barrier which decreases the amount of high-energy photoelectrons and affects the short-wave response.
Keywords:  GaAs photocathode      gradient doping      molecular beam epitaxy      carrier concentration distribution  
Received:  11 January 2009      Revised:  07 April 2009      Accepted manuscript online: 
PACS:  85.60.Ha (Photomultipliers; phototubes and photocathodes)  
  61.72.uj (III-V and II-VI semiconductors)  
  73.50.Gr (Charge carriers: generation, recombination, lifetime, trapping, mean free paths)  
  73.50.Pz (Photoconduction and photovoltaic effects)  
  73.61.Ey (III-V semiconductors)  
  81.15.Hi (Molecular, atomic, ion, and chemical beam epitaxy)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 60678043 and 60801036).

Cite this article: 

Zhang Yi-Jun(张益军), Chang Ben-Kang(常本康), Yang Zhi(杨智), Niu Jun(牛军), and Zou Ji-Jun(邹继军) Distribution of carriers in gradient-doping transmission-mode GaAs photocathodes grown by molecular beam epitaxy 2009 Chin. Phys. B 18 4541

[1] Strain compensated type II superlattices grown by molecular beam epitaxy
Chao Ning(宁超), Tian Yu(于天), Rui-Xuan Sun(孙瑞轩), Shu-Man Liu(刘舒曼), Xiao-Ling Ye(叶小玲), Ning Zhuo(卓宁), Li-Jun Wang(王利军), Jun-Qi Liu(刘俊岐), Jin-Chuan Zhang(张锦川), Shen-Qiang Zhai(翟慎强), and Feng-Qi Liu(刘峰奇). Chin. Phys. B, 2023, 32(4): 046802.
[2] Electroluminescence explored internal behavior of carriers in InGaAsP single-junction solar cell
Xue-Fei Li(李雪飞), Wen-Xian Yang(杨文献), Jun-Hua Long(龙军华), Ming Tan(谭明), Shan Jin(金山), Dong-Ying Wu(吴栋颖), Yuan-Yuan Wu(吴渊渊), and Shu-Long Lu(陆书龙). Chin. Phys. B, 2023, 32(1): 017801.
[3] Selective formation of ultrathin PbSe on Ag(111)
Jing Wang(王静), Meysam Bagheri Tagani, Li Zhang(张力), Yu Xia(夏雨), Qilong Wu(吴奇龙), Bo Li(黎博), Qiwei Tian(田麒玮), Yuan Tian(田园), Long-Jing Yin(殷隆晶), Lijie Zhang(张利杰), and Zhihui Qin(秦志辉). Chin. Phys. B, 2022, 31(9): 096801.
[4] Effect of f-c hybridization on the $\gamma\to \alpha$ phase transition of cerium studied by lanthanum doping
Yong-Huan Wang(王永欢), Yun Zhang(张云), Yu Liu(刘瑜), Xiao Tan(谈笑), Ce Ma(马策), Yue-Chao Wang(王越超), Qiang Zhang(张强), Deng-Peng Yuan(袁登鹏), Dan Jian(简单), Jian Wu(吴健), Chao Lai(赖超), Xi-Yang Wang(王西洋), Xue-Bing Luo(罗学兵), Qiu-Yun Chen(陈秋云), Wei Feng(冯卫), Qin Liu(刘琴), Qun-Qing Hao(郝群庆), Yi Liu(刘毅), Shi-Yong Tan(谭世勇), Xie-Gang Zhu(朱燮刚), Hai-Feng Song(宋海峰), and Xin-Chun Lai(赖新春). Chin. Phys. B, 2022, 31(8): 087102.
[5] Interface effect on superlattice quality and optical properties of InAs/GaSb type-II superlattices grown by molecular beam epitaxy
Zhaojun Liu(刘昭君), Lian-Qing Zhu(祝连庆), Xian-Tong Zheng(郑显通), Yuan Liu(柳渊), Li-Dan Lu(鹿利单), and Dong-Liang Zhang(张东亮). Chin. Phys. B, 2022, 31(12): 128503.
[6] Molecular beam epitaxy growth of quantum devices
Ke He(何珂). Chin. Phys. B, 2022, 31(12): 126804.
[7] Plasma assisted molecular beam epitaxial growth of GaN with low growth rates and their properties
Zhen-Hua Li(李振华), Peng-Fei Shao(邵鹏飞), Gen-Jun Shi(施根俊), Yao-Zheng Wu(吴耀政), Zheng-Peng Wang(汪正鹏), Si-Qi Li(李思琦), Dong-Qi Zhang(张东祺), Tao Tao(陶涛), Qing-Jun Xu(徐庆君), Zi-Li Xie(谢自力), Jian-Dong Ye(叶建东), Dun-Jun Chen(陈敦军), Bin Liu(刘斌), Ke Wang(王科), You-Dou Zheng(郑有炓), and Rong Zhang(张荣). Chin. Phys. B, 2022, 31(1): 018102.
[8] Nanoscale structural investigation of Zn1-xMgxO alloy films on polar and nonpolar ZnO substrates with different Mg contents
Xin Liang(梁信), Hua Zhou(周华), Hui-Qiong Wang(王惠琼), Lihua Zhang(张丽华), Kim Kisslinger, and Junyong Kang(康俊勇). Chin. Phys. B, 2021, 30(9): 096107.
[9] GaSb-based type-I quantum well cascade diode lasers emitting at nearly 2-μm wavelength with digitally grown AlGaAsSb gradient layers
Yi Zhang(张一), Cheng-Ao Yang(杨成奥), Jin-Ming Shang(尚金铭), Yi-Hang Chen(陈益航), Tian-Fang Wang(王天放), Yu Zhang(张宇), Ying-Qiang Xu(徐应强), Bing Liu(刘冰), and Zhi-Chuan Niu(牛智川). Chin. Phys. B, 2021, 30(9): 094204.
[10] Analysis of properties of krypton ion-implanted Zn-polar ZnO thin films
Qing-Fen Jiang(姜清芬), Jie Lian(连洁), Min-Ju Ying(英敏菊), Ming-Yang Wei(魏铭洋), Chen-Lin Wang(王宸琳), and Yu Zhang(张裕). Chin. Phys. B, 2021, 30(9): 097801.
[11] Epitaxial growth and transport properties of compressively-strained Ba2IrO4 films
Yun-Qi Zhao(赵蕴琦), Heng Zhang(张衡), Xiang-Bin Cai(蔡祥滨), Wei Guo(郭维), Dian-Xiang Ji(季殿祥), Ting-Ting Zhang(张婷婷), Zheng-Bin Gu(顾正彬), Jian Zhou(周健), Ye Zhu(朱叶), and Yue-Feng Nie(聂越峰). Chin. Phys. B, 2021, 30(8): 087401.
[12] Dual-wavelength ultraviolet photodetector based on vertical (Al,Ga)N nanowires and graphene
Min Zhou(周敏), Yukun Zhao(赵宇坤), Lifeng Bian(边历峰), Jianya Zhang(张建亚), Wenxian Yang(杨文献), Yuanyuan Wu(吴渊渊), Zhiwei Xing(邢志伟), Min Jiang(蒋敏), and Shulong Lu(陆书龙). Chin. Phys. B, 2021, 30(7): 078506.
[13] Growth of high-crystallinity uniform GaAs nanowire arrays by molecular beam epitaxy
Yu-Bin Kang(亢玉彬), Feng-Yuan Lin(林逢源), Ke-Xue Li(李科学), Ji-Long Tang(唐吉龙), Xiao-Bing Hou(侯效兵), Deng-Kui Wang(王登魁), Xuan Fang(方铉), Dan Fang(房丹), Xin-Wei Wang(王新伟), and Zhi-Peng Wei(魏志鹏). Chin. Phys. B, 2021, 30(7): 078102.
[14] Vertical MBE growth of Si fins on sub-10 nm patterned substrate for high-performance FinFET technology
Shuang Sun(孙爽), Jian-Huan Wang(王建桓), Bao-Tong Zhang(张宝通), Xiao-Kang Li(李小康), Qi-Feng Cai(蔡其峰), Xia An(安霞), Xiao-Yan Xu(许晓燕), Jian-Jun Zhang(张建军), and Ming Li(黎明). Chin. Phys. B, 2021, 30(7): 078104.
[15] Molecular beam epitaxy growth of iodide thin films
Xinqiang Cai(蔡新强), Zhilin Xu(徐智临), Shuai-Hua Ji(季帅华), Na Li(李娜), and Xi Chen(陈曦). Chin. Phys. B, 2021, 30(2): 028102.
No Suggested Reading articles found!