Amine-Assisted Ligand-Exchange Method to Enhance Photovoltaic Parameters in FAPbI3 Nanocrystal Solar Cells

Jo, Seung-Hyeon; Yang, Wenqiang; Tang, Yipeng; Kim, Dong-Hyeok; Lee, Wonjong; Park, Jinwoo; Chang, Seong Eui; Lim, Sung Yeon; Kim, Seongheon; Lee, Yun Seog; Kim, Jin Young; Lim, Jongchul; Hu, Bin; Zhu, Kai; Lee, Tae-Woo

doi:10.1021/acsenergylett.4c00928

Amine-Assisted Ligand-Exchange Method to Enhance Photovoltaic Parameters in FAPbI3 Nanocrystal Solar Cells

Journal Article · Fri May 17 04:00:00 EDT 2024 · ACS Energy Letters

DOI:https://doi.org/10.1021/acsenergylett.4c00928· OSTI ID:2433787

Jo, Seung-Hyeon; Yang, Wenqiang; Tang, Yipeng; Kim, Dong-Hyeok; Lee, Wonjong; Park, Jinwoo; Chang, Seong Eui; Lim, Sung Yeon; Kim, Seongheon; Lee, Yun Seog; Kim, Jin Young; Lim, Jongchul; Hu, Bin; Zhu, Kai; Lee, Tae-Woo

Perovskite colloidal nanocrystals (PeNCs) have exceptional optoelectronic properties and phase stability, making them promising for photovoltaic applications. However, insulating ligands on PeNC surfaces limit the current density and reduce the power conversion efficiency (PCE) in PeNC solar cells (SCs). This study introduces an amine-assisted ligand-exchange (ALE) strategy using 3-phenyl-1-propylamine (3P1P) to effectively remove long ligands from PeNC films. ALE reduced long-chain ligand density without increasing the number of defect states and therefore reduced the exciton-binding energy of FAPbI3 NC films. These changes facilitated exciton dissociation and charge transport in FAPbI3 PeNC SCs. The facilitation of exciton dissociation was due to the increased magnetic dipole interaction between excitons after the ALE process. The use of ALE achieved FAPbI3 PeNC SCs that had an improved short-circuit current density of 17.98 mA/cm2 and a PCE of 15.56% with improved stability after the treatment and negligible hysteresis. This work provides new insight into engineering PeNC films.

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE National Renewable Energy Laboratory (NREL); National Research Foundation of Korea

DOE Contract Number:: AC36-08GO28308

OSTI ID:: 2433787

Report Number(s):: NREL/JA-5900-90945; MainId:92723; UUID:3ba30581-2ac8-4f1d-9aef-75fca7a21cb6; MainAdminId:73410

Journal Information:: ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 6 Vol. 9

Country of Publication:: United States

Language:: English

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MATERIALS SCIENCE
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stability

Amine-Assisted Ligand-Exchange Method to Enhance Photovoltaic Parameters in FAPbI3 Nanocrystal Solar Cells

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