Kulkarni, Ashish ORCID: 0000-0002-7945-208X, Unlu, Feray ORCID: 0000-0001-7242-8020, Pant, Namrata ORCID: 0000-0001-9409-6055, Kaur, Jagjit ORCID: 0000-0002-7344-0539, Bohr, Christoph ORCID: 0000-0002-8427-8346, Jena, Ajay Kumar ORCID: 0000-0002-9279-5079, oz, Senol, Yanagida, Masatoshi, Shirai, Yasuhiro ORCID: 0000-0003-2164-5468, Ikegami, Masashi, Miyano, Kenjiro, Tachibana, Yasuhiro, Chakraborty, Sudip, Mathur, Sanjay and Miyasaka, Tsutomu (2021). Concerted Ion Migration and Diffusion-Induced Degradation in Lead-Free Ag3BiI6 Rudorffite Solar Cells under Ambient Conditions. Sol. RRL, 5 (8). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 2367-198X

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Abstract

Silver bismuth iodide (SBI) materials have recently gained attention as nontoxic alternatives to lead perovskites. Although most of the studies have been focusing on photovoltaic performance, the inherent ionic nature of SBI materials, their diffusive behavior, and influence on material/device stability is underexplored. Herein, AgBi2I7, Ag2BiI5, and Ag3BiI6 thin films are developed in controlled ambient humidity conditions with a decent efficiency up to 2.32%. While exploring the device stability, it is found that Ag3BiI6 exhibits a unique ion-migration behavior where Ag+, Bi3+, and I- ions migrate and diffuse through the dopant-free hole transport layer (HTL) leading to degradation. Interestingly, this ion-migration behavior is relatively fast for the case of antisolvent-processed Ag3BiI6 thin-film-based devices contrasting the case of without antisolvent and is not observed for other SBI material-based devices. Theoretical calculations suggest that low decomposition enthalpy favors the decomposition of Ag3BiI6 to AgI and BiI3 causing migration of ions to the electrode which is protected by using a thick HTL . The new mechanism reported herein underlines the importance of SBI material composition and fundamental mechanism understanding on the stability of Ag3BiI6 material for better solar cell design and also in extending the applications of unique ion-migration behavior in various optoelectronics.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Kulkarni, AshishUNSPECIFIEDorcid.org/0000-0002-7945-208XUNSPECIFIED
Unlu, FerayUNSPECIFIEDorcid.org/0000-0001-7242-8020UNSPECIFIED
Pant, NamrataUNSPECIFIEDorcid.org/0000-0001-9409-6055UNSPECIFIED
Kaur, JagjitUNSPECIFIEDorcid.org/0000-0002-7344-0539UNSPECIFIED
Bohr, ChristophUNSPECIFIEDorcid.org/0000-0002-8427-8346UNSPECIFIED
Jena, Ajay KumarUNSPECIFIEDorcid.org/0000-0002-9279-5079UNSPECIFIED
oz, SenolUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yanagida, MasatoshiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shirai, YasuhiroUNSPECIFIEDorcid.org/0000-0003-2164-5468UNSPECIFIED
Ikegami, MasashiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Miyano, KenjiroUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tachibana, YasuhiroUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chakraborty, SudipUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mathur, SanjayUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Miyasaka, TsutomuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-599361
DOI: 10.1002/solr.202100077
Journal or Publication Title: Sol. RRL
Volume: 5
Number: 8
Date: 2021
Publisher: WILEY-V C H VERLAG GMBH
Place of Publication: WEINHEIM
ISSN: 2367-198X
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
UNDERPOTENTIAL DEPOSITION; PEROVSKITE; BISMUTH; AG; 1ST-PRINCIPLES; HYSTERESIS; ANTIMONYMultiple languages
Energy & Fuels; Materials Science, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/59936

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