Journal
ACS APPLIED NANO MATERIALS
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c00732
Keywords
cesium-lead halide perovskite; nanocrystals; ligand-assisted reprecipitation; highly luminescent nanocrystals; scalable nanotechnology
Funding
- Midstream Research Programme for Universities of the Innovation and Technology Council (ITC) of Hong Kong [MRP/048/20]
- Faculty of Medicine, The Chinese University of Hong Kong
- Gerald Choa Neuroscience Centre
- Margaret K. L. Cheung Research Centre for Parkinsonism Management, Faculty of Medicine, The Chinese University of Hong Kong [FIA2017/B/01, CIA20CU01]
- Croucher Foundation
- Collaborative Research Fund
- University Grants Committee of Hong Kong [C6027-19GF]
- Excellent Young Scientists Fund from the National Natural Science Foundation of China [AoE/M-604/16]
- Innovation and Technology Commission [ITC-CNERC14SC01]
- Natural Science Foundation of Guangdong Province
- Li Ka Shing Foundation [2019B121205002]
- [FIA2020/B/01]
Ask authors/readers for more resources
In this study, a simple, reproducible, and scalable method was developed for the synthesis of alpha-CsPbI3 perovskite nanocrystals in open air at room temperature. The resulting nanocrystals exhibited ideal band-gap energy and high quantum yields, making them a promising material for efficient solar cells and light-emitting diodes.
Cesium-lead iodide perovskite nanocrystal (PNC) is a promising material for efficient solar cells and red-light-emitting diodes, especially for the cubic-structured alpha polymorph with its ideal band-gap energy. We report the first room temperature, one-pot synthesis of alpha-CsPbI3 PNCs in open air, achieved by optimized ligand-solvent combinations to control the crystallization kinetics and phase preference of CsPbI3. The resulting 6.0-nm-sized, alpha-phase nanocubes have photoluminescence peaks at 642 nm (full-width at half-maximum: 44 nm) and absolute quantum yields of up to 83% after purification. The method is simple, reproducible, scalable, and generalizable to other cesium-lead halide and formamidinium lead iodide PNCs.
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