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- Publisher Website: 10.1021/acsami.0c18862
- Scopus: eid_2-s2.0-85097771374
- PMID: 33296167
- WOS: WOS:000603397200048
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Article: Critical Role of Functional Groups in Defect Passivation and Energy Band Modulation in Efficient and Stable Inverted Perovskite Solar Cells Exceeding 21% Efficiency
Title | Critical Role of Functional Groups in Defect Passivation and Energy Band Modulation in Efficient and Stable Inverted Perovskite Solar Cells Exceeding 21% Efficiency |
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Authors | |
Keywords | perovskite solar cells NiOx interface engineering defect passivation energy level alignment modulation |
Issue Date | 2020 |
Publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/aamick |
Citation | ACS Applied Materials & Interfaces, 2020, v. 12 n. 51, p. 57165-57173 How to Cite? |
Abstract | Interfaces in perovskite solar cells (PSCs) are closely related to their power conversion efficiency (PCE) and stability. It is highly desirable to minimize the interfacial nonradiative recombination losses through rational interfacial engineering. Herein we develop an effective and easily reproducible interface engineering strategy where three mercaptobenzimidazole (MBI)-based molecules are employed to modify the perovskite/electron transport layer (ETL) interface. MBI and MBI-OCH3 can not only passivate defects at surface and grain boundaries (GBs) of perovskite films but can also improve energy level alignment (ELA), which leads to enhanced PCE and stability. Consequently, the PCE is improved from 19.5% for the control device to 21.2% for MBI-modified device, which is among the best reported inverted MAPbI3-based PSCs. In contrast, incorporation of MBI-NO2 increases defect density and negligibly influences the energy level alignment. This work indicates that defect passivation and ELA modulation can be achieved simultaneously through modulating functional groups in interface modification molecules. |
Persistent Identifier | http://hdl.handle.net/10722/305344 |
ISSN | 2023 Impact Factor: 8.3 2023 SCImago Journal Rankings: 2.058 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | ZHENG, J | - |
dc.contributor.author | Chen, J | - |
dc.contributor.author | OUYANG, D | - |
dc.contributor.author | HUANG, Z | - |
dc.contributor.author | HE, X | - |
dc.contributor.author | KIM, J | - |
dc.contributor.author | Choy, WCH | - |
dc.date.accessioned | 2021-10-20T10:08:05Z | - |
dc.date.available | 2021-10-20T10:08:05Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | ACS Applied Materials & Interfaces, 2020, v. 12 n. 51, p. 57165-57173 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.uri | http://hdl.handle.net/10722/305344 | - |
dc.description.abstract | Interfaces in perovskite solar cells (PSCs) are closely related to their power conversion efficiency (PCE) and stability. It is highly desirable to minimize the interfacial nonradiative recombination losses through rational interfacial engineering. Herein we develop an effective and easily reproducible interface engineering strategy where three mercaptobenzimidazole (MBI)-based molecules are employed to modify the perovskite/electron transport layer (ETL) interface. MBI and MBI-OCH3 can not only passivate defects at surface and grain boundaries (GBs) of perovskite films but can also improve energy level alignment (ELA), which leads to enhanced PCE and stability. Consequently, the PCE is improved from 19.5% for the control device to 21.2% for MBI-modified device, which is among the best reported inverted MAPbI3-based PSCs. In contrast, incorporation of MBI-NO2 increases defect density and negligibly influences the energy level alignment. This work indicates that defect passivation and ELA modulation can be achieved simultaneously through modulating functional groups in interface modification molecules. | - |
dc.language | eng | - |
dc.publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/aamick | - |
dc.relation.ispartof | ACS Applied Materials & Interfaces | - |
dc.rights | This document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html]. | - |
dc.subject | perovskite solar cells | - |
dc.subject | NiOx | - |
dc.subject | interface engineering | - |
dc.subject | defect passivation | - |
dc.subject | energy level alignment modulation | - |
dc.title | Critical Role of Functional Groups in Defect Passivation and Energy Band Modulation in Efficient and Stable Inverted Perovskite Solar Cells Exceeding 21% Efficiency | - |
dc.type | Article | - |
dc.identifier.email | Choy, WCH: chchoy@eee.hku.hk | - |
dc.identifier.authority | Choy, WCH=rp00218 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1021/acsami.0c18862 | - |
dc.identifier.pmid | 33296167 | - |
dc.identifier.scopus | eid_2-s2.0-85097771374 | - |
dc.identifier.hkuros | 327824 | - |
dc.identifier.volume | 12 | - |
dc.identifier.issue | 51 | - |
dc.identifier.spage | 57165 | - |
dc.identifier.epage | 57173 | - |
dc.identifier.isi | WOS:000603397200048 | - |
dc.publisher.place | United States | - |