journal article·2022-09-23

Direct Room Temperature Synthesis of α-CsPbI3 Perovskite Nanocrystals with High Photoluminescence Quantum Yields: Implications for Lighting and Photovoltaic Applications

Hei Ming Lai, Zhangdi Lu, Chun Kit K. Choi, Wentao Zhou, Chun Ngo Yau, Ben Zhong Tang, Ho Ko

ACS Applied Nano Materials· Volume 5· Issue 9
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Abstract

Cesium-lead iodide perovskite nanocrystal (PNC) is a promising material for efficient solar cells and red-light-emitting diodes, especially for the cubic-structured α polymorph with its ideal band-gap energy. We report the first room temperature, one-pot synthesis of α-CsPbI3PNCs 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, α-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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Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · 2D Materials and Applications

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

Affiliations

Department of Psychiatry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong

Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong

Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong

Gerald Choa Neuroscience Centre, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong

Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China

Department of Chemistry, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China

Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China

Department of Chemical Pathology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong

Guangdong−Hong Kong−Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China

Funding

Research Grants Council, University Grants Committee · Innovation and Technology Commission · Croucher Foundation · National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province · Chinese University of Hong Kong · Gerald Choa Neuroscience Centre · Margaret K. L. Cheung Research Centre for Parkinsonism Management, Faculty of Medicine, CUHK

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