Hybrid light emitting diodes based on stable, high brightness all-inorganic CsPbI 3 perovskite nanocrystals and InGaN

Zhang, Chengxi; Turyanska, Lyudmila; Cao, Haicheng; Zhao, Lixia; Fay, Michael W.; Temperton, Robert; O'Shea, James; Thomas, Neil R.; Wang, Kaiyou; Luan, Weiling; Patanè, Amalia

Abstract

Despite important advances in the synthesis of inorganic perovskite nanocrystals (NCs), the long-term instability and degradation of their quantum yield (QY) over time need to be addressed to enable the further development and exploitation of these nanomaterials. Here we report on stable CsPbI3 perovskite NCs and their use in hybrid light emitting diodes (LEDs), which combine in one system the NCs and a blue GaN-based LED. Nanocrystals with improved morphological and optical properties are obtained by optimizing the post-synthesis replacement of oleic acid ligands with iminodibenzoic acid: the NCs have a long shell-life (> 2 months), stability under different environmental conditions, and a high QY, of up to 90%, in the visible spectral range. Ligand replacement enables the engineering of the morphological and optical properties of the NCs. Furthermore, the NCs can be used to coat the surface of a GaN-LED to realize a stable diode where they are excited by blue light from the LED under low current injection conditions, resulting into emissions at distinct wavelengths in the visible range. The high QY and fluorescence lifetime in the nanosecond range are key parameters for visible light communication, an emerging technology that requires high-performance visible light sources for secure, fast energy-efficient wireless transmission.

Citation

Zhang, C., Turyanska, L., Cao, H., Zhao, L., Fay, M. W., Temperton, R., …Patanè, A. (2019). Hybrid light emitting diodes based on stable, high brightness all-inorganic CsPbI 3 perovskite nanocrystals and InGaN. Nanoscale, 11(28), 13450-13457. https://doi.org/10.1039/C9NR03707A

• Journal Article Type: Article
• Acceptance Date: Jun 4, 2019
• Online Publication Date: Jul 9, 2019
• Publication Date: Jul 28, 2019
• Deposit Date: Jun 11, 2019
• Publicly Available Date: Jul 10, 2019
• Journal: Nanoscale
• Print ISSN: 2040-3364
• Electronic ISSN: 2040-3372
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: 28
• Pages: 13450-13457
• DOI: https://doi.org/10.1039/C9NR03707A
• Keywords: General Materials Science
• Public URL: https://nottingham-repository.worktribe.com/output/2171955
• Publisher URL: https://pubs.rsc.org/en/content/articlelanding/2019/NR/C9NR03707A#!divAbstract
• Additional Information: : This document is Similarity Check deposited; : Supplementary Information; : Chengxi Zhang (ORCID); : Chengxi Zhang (ResearcherID); : Lyudmila Turyanska (ORCID); : Haicheng Cao (ORCID); : Lixia Zhao (ORCID); : Michael W. Fay (ORCID); : Robert Temperton (ORCID); : Neil R. Thomas (ORCID); : Kaiyou Wang (ORCID); : Single-blind; : Received 30 April 2019; Accepted 4 June 2019; Advance Article published 9 July 2019; Version of Record published 18 July 2019