Template-Assisted Growth of High-Quality α-Phase FAPbI3 Crystals in Perovskite Solar Cells Using Thiol-Functionalized MoS2 Nanosheets

Yin, Yifan; Zhou, Yuchen; Fu, Shi; Lin, Yu-Chung; Zuo, Xianghao; Raut, Aniket; Zhang, Yugang; Tsai, Esther R.; Li, Mingxing; Lu, Fang; Zhou, Chenyu; Li, Tai-De; Kisslinger, Kim; Cotlet, Mircea; Nam, Chang-Yong; Rafailovich, Miriam H.

doi:10.1021/acsnano.4c11268

Title: Template-Assisted Growth of High-Quality α-Phase FAPbI₃ Crystals in Perovskite Solar Cells Using Thiol-Functionalized MoS₂ Nanosheets

Journal Article · 22 October 2024 · ACS Nano

DOI: https://doi.org/10.1021/acsnano.4c11268 · OSTI ID:2477955

Yin, Yifan ^[1]; Zhou, Yuchen ^[1]; Fu, Shi ^[1];

^[1];

^[2]; Tsai, Esther R. ^[2]; Li, Mingxing ^[2];

^[2]; Zhou, Chenyu ^[2]; Li, Tai-De ^[3]; Kisslinger, Kim ^[2]; Cotlet, Mircea ^[2];

^[4]; Rafailovich, Miriam H. ^[1]

Stony Brook Univ., NY (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
City Univ. of New York (CUNY), NY (United States)
Stony Brook Univ., NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)

Formamidinium lead iodide (FAPI) has gained attention for hybrid perovskite solar cell (PSC) applications due to its enhanced stability and narrow bandgap. However, a significant challenge remains in inducing and stabilizing the elusive perovskite “black phase”—photoactive cubic α-FAPI—as the relatively bulky FA⁺ cations tend to favor the thermodynamically stable nonphotoactive “yellow phase”. Here, in this study, we present a templated growth strategy employing thiol-functionalized MoS₂ nanosheets as templates. By introduction of 3-mercaptopropionic acid (MPA)-functionalized MoS₂ as a growth template, precise control over crystal formation was achieved, favoring the growth of high-quality α-FAPI films. These advanced templated films exhibited substantial improvements in charge transport properties, efficient light absorption, and enhanced charge extraction. As a result, the PSCs achieved a significantly enhanced power conversion efficiency (PCE) compared to the nontemplated control device, increasing from 20.6 to 22.5%. The MoS₂-incorporated device also demonstrated excellent shelf stability, maintaining 91% of the initial PCE even after 1600 h of storage without device encapsulation.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: SC0012704

OSTI ID:: 2477955

Report Number(s):: BNL--226350-2024-JAAM; BNL--226395-2024-JAAM

Journal Information:: ACS Nano, Journal Name: ACS Nano Journal Issue: 44 Vol. 18; ISSN 1936-0851

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Template-Assisted Growth of High-Quality α-Phase FAPbI3 Crystals in Perovskite Solar Cells Using Thiol-Functionalized MoS2 Nanosheets

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Title: Template-Assisted Growth of High-Quality α-Phase FAPbI₃ Crystals in Perovskite Solar Cells Using Thiol-Functionalized MoS₂ Nanosheets