Improving the efficiency and stability of in-air fabricated perovskite solar cells using the mixed antisolvent of methyl acetate and chloroform

Eze, Martin C. ORCID: https://orcid.org/0000-0003-2724-7516, Eze, Hyginus U. ORCID: https://orcid.org/0000-0003-2724-7516, Ugwuanyi, Godwin N., Alnajideen, Mohammad, Atia, Abdulhamid ORCID: https://orcid.org/0000-0003-0683-5052, Olisa, Samuel C., Rocha, Victoria G. and Min, Gao 2022. Improving the efficiency and stability of in-air fabricated perovskite solar cells using the mixed antisolvent of methyl acetate and chloroform. Organic Electronics 107 , 106552. 10.1016/j.orgel.2022.106552

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Abstract

Antisolvents play a significant role in obtaining high-quality perovskite films during the fabrication process. This paper reports a novel mixture of two antisolvents (methyl acetate and chloroform) that proves effective for fabricating high-quality perovskite films in a high humidity ambient. The results show that the use of methyl acetate alone as the antisolvent enables the fabrication of dense perovskite films (MAPbI3) in a high humidity ambient, but with a rough surface, while mixing methyl acetate with an appropriate amount of chloroform produces not only dense perovskite films but also smooth surfaces. As a result, the power conversion efficiency (PCE) is increased from 17.1% of the devices treated with methyl acetate alone to 18.6% of the devices treated with the mixed antisolvent of methyl acetate (70%) and chloroform (30%). The stability of the devices was also improved significantly for the devices treated with the mixed antisolvent of methyl acetate (85%) and chloroform (15%), which exhibit a slow degradation of 7% in PCE after 552 h of storage, compared to 22% for the devices treated with methyl acetate alone.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Additional Information:	License information from Publisher: LICENSE 1: URL: http://creativecommons.org/licenses/by/4.0/, Start Date: 2022-05-16
Publisher:	Elsevier
ISSN:	1566-1199
Funders:	EPSRC
Date of First Compliant Deposit:	7 June 2022
Date of Acceptance:	11 May 2022
Last Modified:	08 Apr 2024 13:14
URI:	https://orca.cardiff.ac.uk/id/eprint/150247

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