Enhanced Photovoltaic Performance of FASnI3-Based Perovskite Solar Cells with Hydrazinium Chloride Coadditive

Md Emrul Kayesh, Towhid H. Chowdhury, Kiyoto Matsuishi, Ryuji Kaneko, Said Kazaoui, Jae Joon Lee, Takeshi Noda, Ashraful Islam

Research output: Contribution to journalArticlepeer-review

206 Scopus citations

Abstract

For the fabrication of efficient Sn-based perovskite solar cells (PSCs), deposition of uniform and pinhole-free perovskite films with low Sn4+ content remains a crucial factor. In this work, we present a coadditive engineering process by introduction of hydrazinium chloride (N2H5Cl) in a single precursor solvent system to fabricate FASnI3 perovskite films. The successful integration of N2H5Cl results in reduced concentration of Sn4+ content by 20% in the FASnI3 film leading to suppressed carrier recombination and pinhole-free uniform coverage. These remarkable improvements in the FASnI3 film results in power conversion efficiency (PCE) of Sn-based PSC up to 5.4% due to a significant increase in open-circuit voltage. Moreover, the best PSC without encapsulation showed stable shelf life up to 1000 h while retaining 65% of its initial PCE.

Original languageEnglish
Pages (from-to)1584-1589
Number of pages6
JournalACS Energy Letters
Volume3
Issue number7
DOIs
StatePublished - 13 Jul 2018

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