Understanding and design of efficient carrier-selective contacts for solar cells

Numerous efforts have been devoted to either understanding or fabricating efficient carrier-selective contacts, since they play a significantly crucial role in high-performance solar cells. In this work, we demonstrate that the asymmetry between electron conductivity and hole conductivity is importa...

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Autores principales:	Guangyi Wang, Chenxu Zhang, Heng Sun, Zengguang Huang, Sihua Zhong
Formato:	article
Lenguaje:	EN
Publicado:	AIP Publishing LLC 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/13dd4befe52e4d3f83d691943939a118
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spelling	oai:doaj.org-article:13dd4befe52e4d3f83d691943939a1182021-12-01T18:52:06ZUnderstanding and design of efficient carrier-selective contacts for solar cells2158-322610.1063/5.0063915https://doaj.org/article/13dd4befe52e4d3f83d691943939a1182021-11-01T00:00:00Zhttp://dx.doi.org/10.1063/5.0063915https://doaj.org/toc/2158-3226Numerous efforts have been devoted to either understanding or fabricating efficient carrier-selective contacts, since they play a significantly crucial role in high-performance solar cells. In this work, we demonstrate that the asymmetry between electron conductivity and hole conductivity is important but far not enough for efficient carrier-selective contacts. Taking electron-selective contacts as examples, cell performances are greatly affected by the electron conductivity, the hole conductivity, and the work function of electron-selective materials, together with conduction and valance band offset between absorbers and electron-selective layers. When designing efficient electron-selective contacts, all these factors should be considered to mitigate carrier recombination and downward bending of the electron quasi-Fermi level within and around the contacts and to ensure low interfacial resistance for electrons. Although the absorber is crystalline silicon in the study, we believe that our understanding and design guidelines are also applicable to solar cells based on other absorbers.Guangyi WangChenxu ZhangHeng SunZengguang HuangSihua ZhongAIP Publishing LLCarticlePhysicsQC1-999ENAIP Advances, Vol 11, Iss 11, Pp 115026-115026-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Guangyi Wang Chenxu Zhang Heng Sun Zengguang Huang Sihua Zhong Understanding and design of efficient carrier-selective contacts for solar cells
description	Numerous efforts have been devoted to either understanding or fabricating efficient carrier-selective contacts, since they play a significantly crucial role in high-performance solar cells. In this work, we demonstrate that the asymmetry between electron conductivity and hole conductivity is important but far not enough for efficient carrier-selective contacts. Taking electron-selective contacts as examples, cell performances are greatly affected by the electron conductivity, the hole conductivity, and the work function of electron-selective materials, together with conduction and valance band offset between absorbers and electron-selective layers. When designing efficient electron-selective contacts, all these factors should be considered to mitigate carrier recombination and downward bending of the electron quasi-Fermi level within and around the contacts and to ensure low interfacial resistance for electrons. Although the absorber is crystalline silicon in the study, we believe that our understanding and design guidelines are also applicable to solar cells based on other absorbers.
format	article
author	Guangyi Wang Chenxu Zhang Heng Sun Zengguang Huang Sihua Zhong
author_facet	Guangyi Wang Chenxu Zhang Heng Sun Zengguang Huang Sihua Zhong
author_sort	Guangyi Wang
title	Understanding and design of efficient carrier-selective contacts for solar cells
title_short	Understanding and design of efficient carrier-selective contacts for solar cells
title_full	Understanding and design of efficient carrier-selective contacts for solar cells
title_fullStr	Understanding and design of efficient carrier-selective contacts for solar cells
title_full_unstemmed	Understanding and design of efficient carrier-selective contacts for solar cells
title_sort	understanding and design of efficient carrier-selective contacts for solar cells
publisher	AIP Publishing LLC
publishDate	2021
url	https://doaj.org/article/13dd4befe52e4d3f83d691943939a118
work_keys_str_mv	AT guangyiwang understandinganddesignofefficientcarrierselectivecontactsforsolarcells AT chenxuzhang understandinganddesignofefficientcarrierselectivecontactsforsolarcells AT hengsun understandinganddesignofefficientcarrierselectivecontactsforsolarcells AT zengguanghuang understandinganddesignofefficientcarrierselectivecontactsforsolarcells AT sihuazhong understandinganddesignofefficientcarrierselectivecontactsforsolarcells
_version_	1718404676786847744

Understanding and design of efficient carrier-selective contacts for solar cells

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