caa a22 4500 463212924 CHVBK 20180405153147.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s00339-007-4142-2 doi (NATIONALLICENCE)springer-10.1007/s00339-007-4142-2 Dark currents of GaAs/AlGaAs quantum-well infrared photodetectors [Elektronische Daten] [N. Li, D.-Y. Xiong, X.-F. Yang, W. Lu, W.-L. Xu, C.-L. Yang, Y. Hou, Y. Fu] We study the dark current of the GaAs/AlGaAs quantum-well infrared photodetector (QWIP) by assuming a drift-diffusion carrier transport in the barriers where the electric fields are obtained by the current continuity condition and the self-consistent energy band structure. It has been shown that due to the current continuity condition, the dark currents across the QWIP devices are determined by the thermionic emission from the emitter to the multiple quantum well (MQW) region. The self-consistent calculation of the Schrödinger and Poisson equations shows a weak electric field in the barrier region connecting to the emitter (much smaller than the average field across the QWIP at low bias) due to the accumulation of carriers in the triangle quantum well formed at the emitter-MQW interface, which results in a very small dark current at low bias. The numerical results explain well our experimental observation. Springer-Verlag, 2007 Li N. National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, 200083, Shanghai, P.R. China aut Xiong D.-Y National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, 200083, Shanghai, P.R. China aut Yang X.-F National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, 200083, Shanghai, P.R. China aut Lu W. National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, 200083, Shanghai, P.R. China aut Xu W.-L Department of Electronic Engineering, East China Normal University, 200062, Shanghai, P.R. China aut Yang C.-L Department of Electronic Engineering, East China Normal University, 200062, Shanghai, P.R. China aut Hou Y. Department of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, 10691, Stockholm, Sweden aut Fu Y. Department of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, 10691, Stockholm, Sweden aut Applied Physics A Springer-Verlag 89/3(2007-11-01), 701-705 0947-8396 89:3<701 2007 89 339 https://doi.org/10.1007/s00339-007-4142-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-4142-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li N. National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, 200083, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Xiong D.-Y National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, 200083, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Yang X.-F National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, 200083, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Lu W. National Lab for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, 200083, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Xu W.-L Department of Electronic Engineering, East China Normal University, 200062, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Yang C.-L Department of Electronic Engineering, East China Normal University, 200062, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Hou Y. Department of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, 10691, Stockholm, Sweden aut NATIONALLICENCE 700 1- Fu Y. Department of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, 10691, Stockholm, Sweden aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 89/3(2007-11-01), 701-705 0947-8396 89:3<701 2007 89 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer