Hybrid light emitting diodes based on stable, high brightness all-inorganic CsPbI3 perovskite nanocrystals and InGaN

Zhang, Chengxi and Turyanska, Lyudmila and Cao, Haicheng and Zhao, Lixia and Fay, Michael W. and Temperton, Robert and O'Shea, James and Thomas, Neil R. and Wang, Kaiyou and Luan, Weiling and Patanè, Amalia (2019) Hybrid light emitting diodes based on stable, high brightness all-inorganic CsPbI3 perovskite nanocrystals and InGaN. Nanoscale . ISSN 2040-3372

Full content URL: http://doi.org/10.1039/C9NR03707A

Documents
Hybrid light emitting diodes based on stable, high brightness all-inorganic CsPbI3 perovskite nanocrystals and InGaN
Published PDF
[img]
[Download]
[img] PDF
__Client_C$_Lyudmila_Papers_2019_2019_Nanoscale_Chengxi_synthesis IDA_2019_Nanoscale_perovskite LED.pdf - Whole Document
Available under License Creative Commons Attribution.

2MB
Item Type:Article
Item Status:Live Archive

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 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 shelf-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 in 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.

Keywords:perovskite, device, LED
Subjects:F Physical Sciences > F300 Physics
F Physical Sciences > F200 Materials Science
F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
ID Code:36423
Deposited On:10 Jul 2019 14:21

Repository Staff Only: item control page