CsPb(Br/I)3Perovskite Nanocrystals for Hybrid GaN-Based High-Bandwidth White Light-Emitting Diodes

Ma, Zhanhong; Li, Xiaodong; Zhang, Chengxi; Turyanska, Lyudmila; Lin, Shan; Xi, Xin; Li, Jing; Hu, Tiangui; Wang, Junfei; Patanè, Amalia; Zhao, Lixia

Abstract

The modulation bandwidth of white light emitting diodes (LEDs) is an important factor in visible light communication (VLC) system, which is mainly limited by the down-conversion materials. The broad spectrum and long lifetime of conventional light conversion materials represent an obstacle to future technological developments. Here, we show that inorganic semiconductor perovskite nanocrystals offer a promising alternative nanomaterial. Anion exchange between different perovskite nanocrystals by post-synthesis is a highly efficient protocol to tune the chemical composition and optoelectronic properties of lead halide perovskite nanocrystals. The fine-tuning of the nanocrystal fluorescence is achieved by 2 blending colloidal solutions of CsPb(Br/I)3 lead halide perovskites with different content of halide. The tunable optical emission and short fluorescence lifetime (< 5 ns) of the nanocrystals are exploited to realize white LEDs with a high modulation bandwidth (0.7 GHz), offering a potential route towards fast, energy efficient visible light communication.

Citation

Ma, Z., Li, X., Zhang, C., Turyanska, L., Lin, S., Xi, X., Li, J., Hu, T., Wang, J., Patanè, A., & Zhao, L. (2021). CsPb(Br/I)3Perovskite Nanocrystals for Hybrid GaN-Based High-Bandwidth White Light-Emitting Diodes. ACS Applied Nano Materials, 4(8), 8383-8389. https://doi.org/10.1021/acsanm.1c01604

• Journal Article Type: Article
• Acceptance Date: Jul 7, 2021
• Online Publication Date: Jul 22, 2021
• Publication Date: Aug 27, 2021
• Deposit Date: Jul 15, 2021
• Publicly Available Date: Jul 23, 2022
• Journal: ACS Applied Nano Materials
• Print ISSN: 2574-0970
• Electronic ISSN: 2574-0970
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 4
• Issue: 8
• Pages: 8383-8389
• DOI: https://doi.org/10.1021/acsanm.1c01604
• Keywords: perovskite; fluorescence lifetime; modulation bandwidth; anion exchange; visible light communication
• Public URL: https://nottingham-repository.worktribe.com/output/5786503
• Publisher URL: https://pubs.acs.org/doi/10.1021/acsanm.1c01604
• Additional Information: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsanm.1c01604