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Light-Promoted Electrostatic Adsorption of High-Density Lewis Base Monolayers as Passivating Electron-Selective Contacts
Yang, Xi1; Ying, Zhiqin1,2; Yang, Zhenhai1; Xu, Jia Ru3; Wang, Wei1; Wang, Jiajia1; Wang, Zenggui1; Yao, Lingze1; Yan, Baojie1; Ye, Jichun1
2021-03-01
Source PublicationAdvanced Science
ISSN2198-3844
Volume8Issue:5
Abstract

Achieving efficient passivating carrier-selective contacts (PCSCs) plays a critical role in high-performance photovoltaic devices. However, it is still challenging to achieve both an efficient carrier selectivity and high-level passivation in a sole interlayer due to the thickness dependence of contact resistivity and passivation quality. Herein, a light-promoted adsorption method is demonstrated to establish high-density Lewis base polyethylenimine (PEI) monolayers as promising PCSCs. The promoted adsorption is attributed to the enhanced electrostatic interaction between PEI and semiconductor induced by the photo-generated carriers. The derived angstrom-scale PEI monolayer is demonstrated to simultaneously provide a low-resistance electrical contact for electrons, a high-level field-effect passivation to semiconductor surface and an enhanced interfacial dipole formation at contact interface. By implementing this light-promoted adsorbed PEI as a single-layered PCSC for n-type silicon solar cell, an efficiency of 19.5% with an open-circuit voltage of 0.641 V and a high fill factor of 80.7% is achieved, which is one of the best results for devices with solution-processed electron-selective contacts. This work not only demonstrates a generic method to develop efficient PCSCs for solar cells but also provides a convenient strategy for the deposition of highly uniform, dense, and ultra-thin coatings for diverse applications.

KeywordCarrier-selective Contact Electrostatic Adsorption Lewis Bases Passivating Contact Silicon Solar Cells
DOI10.1002/advs.202003245
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000604281200001
Scopus ID2-s2.0-85099016513
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorYe, Jichun
Affiliation1.Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (CAS), Ningbo, 315201, China
2.Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao
3.3M China Limited, Corporate Research Lab, Shanghai, 200233, China
Recommended Citation
GB/T 7714
Yang, Xi,Ying, Zhiqin,Yang, Zhenhai,et al. Light-Promoted Electrostatic Adsorption of High-Density Lewis Base Monolayers as Passivating Electron-Selective Contacts[J]. Advanced Science,2021,8(5).
APA Yang, Xi,Ying, Zhiqin,Yang, Zhenhai,Xu, Jia Ru,Wang, Wei,Wang, Jiajia,Wang, Zenggui,Yao, Lingze,Yan, Baojie,&Ye, Jichun.(2021).Light-Promoted Electrostatic Adsorption of High-Density Lewis Base Monolayers as Passivating Electron-Selective Contacts.Advanced Science,8(5).
MLA Yang, Xi,et al."Light-Promoted Electrostatic Adsorption of High-Density Lewis Base Monolayers as Passivating Electron-Selective Contacts".Advanced Science 8.5(2021).
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