Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand

Wang, Shuo; Zhao, Qian; Hazarika, Abhijit; Li, Simiao; Wu, Yue; Zhai, Yaxin; Chen, Xihan; Luther, Joseph M.; Li, Guoran

doi:10.1038/s41467-023-37943-6

Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand

Journal Article · Tue Apr 18 00:00:00 EDT 2023 · Nature Communications

DOI:https://doi.org/10.1038/s41467-023-37943-6· OSTI ID:1973219

Wang, Shuo ^[1]; ^[1]; ^[2]; Li, Simiao ^[1]; Wu, Yue ^[1]; ^[3]; ^[4]; ^[5]; ^[1]

Nankai University, Tianjin (China)
CSIR-Indian Institute of Chemical Technology, Hyderabad (India); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
National Renewable Energy Laboratory (NREL), Golden, CO (United States); Hunan Normal University, Changsha (China)
Southern University of Science and Technology, Shenzhen (China)
National Renewable Energy Laboratory (NREL), Golden, CO (United States)

A detailed picture of temperature dependent behavior of Cs_xFA_1-xPbI₃ perovskite quantum dots across the composition range is constructed by performing in situ optical spectroscopic and structural measurements, supported by theoretical calculations that focus on the relation between A-site chemical composition and surface ligand binding. The thermal degradation mechanism depends not only on the exact chemical composition, but also on the ligand binding energy. The thermal degradation of Cs-rich perovskite quantum dots is induced by a phase transition from black γ-phase to yellow δ-phase, while FA-rich perovskite quantum dots with higher ligand binding energy directly decompose into PbI₂. Quantum dot growth to form large bulk size grain is observed for all Cs_xFA_1-xPbI₃ perovskite quantum dots at elevated temperatures. In addition, FA-rich quantum dots possess stronger electron-longitudinal optical phonon coupling, suggesting that photogenerated excitons in FA-rich quantum dots have higher probability to be dissociated by phonon scattering compared to Cs-rich quantum dots.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: Center for Hybrid Organic Inorganic Semiconductors for Energy (CHOISE); China Postdoctoral Science Foundation; National Natural Science Foundation of China; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1973219

Report Number(s):: NREL/JA-5900-84589; MainId:85362; UUID:4f8bb727-3233-45ec-abc9-17cef49fcaa0; MainAdminID:69458

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand

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