journal article·2024-06-14

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

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

ACS Energy Letters· Volume 9· Issue 6
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Abstract

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 FAPbI 3 NC films. These changes facilitated exciton dissociation and charge transport in FAPbI 3 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 FAPbI 3 PeNC SCs that had an improved short-circuit current density of 17.98 mA/cm 2 and a PCE of 15.56% with improved stability after the treatment and negligible hysteresis. This work provides new insight into engineering PeNC films.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

Institute of Atomic Manufacturing, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, People’s Republic of China

Graduate School of Energy Science and Technology (GEST), Chungnam National University, Daejeon 34134, Republic of Korea

Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

Department of Materials Science and Engineering, University of Tennessee, 1001-1099 Estabrook Rd, Knoxville, TN37996, United States

Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States

Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

School of Chemical and Biological Engineering, Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

Soft Foundry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

Interdisciplinary Program in Bioengineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

Funding

National Research Foundation of Korea · Korea Institute of Energy Technology Evaluation and Planning

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