Multifunctional Thiol-Containing Additives for Improved Photoluminescence and Photovoltaic Performance of Cs0.15FA0.85PbI3 Perovskites

Uddin, Md Aslam; Hossain, Tareq; Kothalawala, Nadeesha L.; Joy, Syed; Kim, Doo-Young; Graham, Kenneth R.

doi:10.1021/acsaelm.1c01318

Title: Multifunctional Thiol-Containing Additives for Improved Photoluminescence and Photovoltaic Performance of Cs_0.15FA_0.85PbI₃ Perovskites

Journal Article · Wed Mar 02 00:00:00 EST 2022 · ACS Applied Electronic Materials

DOI:https://doi.org/10.1021/acsaelm.1c01318· OSTI ID:2204713

Uddin, Md Aslam ^[1]; Hossain, Tareq ^[1]; Kothalawala, Nadeesha L. ^[1];

^[1];

^[1]

University of Kentucky, Lexington, KY (United States)

Thiol containing molecules as both interfacial surface ligands and additives are promising modulators for enhancing photoluminescence (PL) properties, stability, and photovoltaic (PV) performance of metal halide perovskites. However, alkanethiols are much more effective for improving photoluminescence (PL) intensity and stability in metal halide perovskite nanocrystals than in their thin film analogues. Herein, we investigate how additional functional groups on a pyrimidine core can alter thiol reactivity and influence the PL, stability, and PV performance of organic metal halide perovskites. Through an investigation of five different pyrimidine derivatives, it is shown that all derivatives containing thiol groups form thiolates in the presence of the perovskite precursors and increase the photoluminescence intensity of the perovskite film. The largest all-around improvement to the PL intensity, stability, and photovoltaic performance of Cs_0.15FA_0.85PbI₃ perovskites is realized through the addition of a hydroxyl group combined with a trifluoromethyl group to form 4-hydroxy-6-(trifluoromethyl)pyrimidine-2-thiol. Furthermore, this investigation helps illuminate how combinations of functional groups can be employed to further increase the beneficial effects over monofunctional additives in organic metal halide perovskites.

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Research Organization:: Univ. of Kentucky, Lexington, KY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0018208

OSTI ID:: 2204713

Journal Information:: ACS Applied Electronic Materials, Vol. 4, Issue 3; ISSN 2637-6113

Publisher:: ACS PublicationsCopyright Statement

Country of Publication:: United States

Language:: English

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14 SOLAR ENERGY
36 MATERIALS SCIENCE
organic metal halide perovskite
thin films
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Title: Multifunctional Thiol-Containing Additives for Improved Photoluminescence and Photovoltaic Performance of Cs0.15FA0.85PbI3 Perovskites

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Title: Multifunctional Thiol-Containing Additives for Improved Photoluminescence and Photovoltaic Performance of Cs_0.15FA_0.85PbI₃ Perovskites