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High-performance solid-state photon-enhanced thermionic emission solar energy converters with graded bandgap window-layer
Yang, Yang1,5; Xu, Peng1,2; Cao, Weiwei1,2,3,4; Zhu, Bingli1,6; Wang, Bo1; Bai, Yonglin1,5; Qin, Junjun2; Bai, Xiaohong5; Chen, Zhen1
作者部门空间科学微光探测技术研究室
2021-02-04
发表期刊JOURNAL OF PHYSICS D-APPLIED PHYSICS
ISSN0022-3727;1361-6463
卷号54期号:5
产权排序1
摘要

To realize a high-performance solid-state photon-enhanced thermionic emission (SPETE) solar energy converter, in this study, a graded bandgap window layer is therefore adopted, throughout which the bandgap gradation is generated via the variation of Al composition in the AlxGa1-xAs layer in the SPETE converter with a GaAs absorber. Based on one-dimension steady-state equation, an analytical model is formed in analyzing performance of the proposed device in our study. Theoretical simulation results indicate that not only are the losses of contact surface recombination being decreased via the bandgap-gradation-induced build-in electric field of the window layer, but also the photon-generated electrons are effectively collected, thereby improving the conversion efficiency. Moreover, the effect of bandgap energy of the contact surface and the width of the window layer on device performance is discussed. A trade-off of high-efficient SPETE converters is therefore realized between large contact surface bandgap and thin window layer width, to which the rationale lies in the improved process of electron collection facilitated by the enhanced build-in electric field rather than reducing the photon absorption in the window layer. Threshold values for barrier height at the emitting interface are presented to guarantee the ideal voltage-current characteristic. It is found that the threshold values of barrier increase with the increase in temperatures.

关键词photon-enhanced thermionic emission solid-state device solar energy converter bandgap gradation AlGaAs/GaAs hetero-junction
DOI10.1088/1361-6463/abbb04
收录类别SCI
语种英语
WOS记录号WOS:000589880400001
出版者IOP PUBLISHING LTD
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.opt.ac.cn/handle/181661/93889
专题空间科学微光探测技术研究室
通讯作者Yang, Yang
作者单位1.Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Ultrafast Photoelect Diagnost Technol, Xian 710119, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100091, Peoples R China
3.Xi An Jiao Tong Univ, Minist Educ, Key Lab Phys Elect & Devices, Xian 710049, Peoples R China
4.Xi An Jiao Tong Univ, Shaanxi Key Lab Informat Photon Tech, Xian 710049, Peoples R China
5.Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China
6.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China
推荐引用方式
GB/T 7714
Yang, Yang,Xu, Peng,Cao, Weiwei,et al. High-performance solid-state photon-enhanced thermionic emission solar energy converters with graded bandgap window-layer[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2021,54(5).
APA Yang, Yang.,Xu, Peng.,Cao, Weiwei.,Zhu, Bingli.,Wang, Bo.,...&Chen, Zhen.(2021).High-performance solid-state photon-enhanced thermionic emission solar energy converters with graded bandgap window-layer.JOURNAL OF PHYSICS D-APPLIED PHYSICS,54(5).
MLA Yang, Yang,et al."High-performance solid-state photon-enhanced thermionic emission solar energy converters with graded bandgap window-layer".JOURNAL OF PHYSICS D-APPLIED PHYSICS 54.5(2021).
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