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

Wang，Shuo1; Zhao，Qian1; Hazarika，Abhijit2,3; Li，Simiao1; Wu，Yue1; Zhai，Yaxin3,4; Chen，Xihan5; Luther，Joseph M.3; Li，Guoran1

2023-12-01

10.1038/s41467-023-37943-6

Nature Communications   影响因子和分区

2041-1723

A detailed picture of temperature dependent behavior of CsFAPbI 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 PbI. Quantum dot growth to form large bulk size grain is observed for all CsFAPbI 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.

SCI

英语

NI论文

其他

National Natural Science Foundation of China-Yunnan Joint Fund[22279066];

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000984481700022

NATURE PORTFOLIO

2-s2.0-85152863693

Scopus

1.Institute of New Energy Material Chemistry,School of Materials Science and Engineering,Nankai University,Tianjin,300350,China
2.Polymers and Functional Materials Division,CSIR-Indian Institute of Chemical Technology,Hyderabad,Uppal Road, Tarnaka,500007,India
3.National Renewable Energy Laboratory,Golden,80401,United States
4.Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,Department of Physics,Hunan Normal University,Changsha,Hunan,410081,China
5.SUSTech Energy Institute for Carbon Neutrality,Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Wang，Shuo,Zhao，Qian,Hazarika，Abhijit,et al. Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand[J]. Nature Communications,2023,14(1).

Wang，Shuo.,Zhao，Qian.,Hazarika，Abhijit.,Li，Simiao.,Wu，Yue.,...&Li，Guoran.(2023).Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand.Nature Communications,14(1).

Wang，Shuo,et al."Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand".Nature Communications 14.1(2023).