Journal article
Solution Processed Bilayer Metal Halide White Light Emitting Diodes
Advanced materials (Weinheim), Vol.37(25), e2412239
06/2025
PMID: 39506369
Web of Science ID: WOS:001354397600001
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Abstract
Metal halide perovskites and perovskite-related organic metal halide hybrids (OMHHs) have recently emerged as a new class of luminescent materials for light emitting diodes (LEDs), owing to their unique and remarkable properties, including near-unity photoluminescence quantum efficiencies, highly tunable emission colors, and low temperature solution processing. While substantial progress has been made in developing monochromatic LEDs with electroluminescence across blue, green, red, and near-infrared regions, achieving highly efficient and stable white electroluminescence from a single LED remains a challenging and under-explored area. Here, a facile approach to generating white electroluminescence is reported by combining narrow sky-blue emission from metal halide perovskites and broadband orange/red emission from zero-dimensional (0D) OMHHs. For the proof of concept, utilizing TPPcarz+ passivated two-dimensional (2D) CsPbBr3 nanoplatelets (NPLs) as sky blue emitter and 0D TPPcarzSbBr4 as orange/red emitter (TPPcarz+ = triphenyl (9-phenyl-9H-carbazol-3-yl) phosphonium), white LEDs (WLEDs) with a solution processed bilayer structure have been fabricated to exhibit a peak external quantum efficiency (EQE) of 4.8% and luminance of 1507 cd m-2 at the Commission Internationale de L'Eclairage (CIE) coordinate of (0.32, 0.35). This work opens a new pathway for creating highly efficient and stable WLEDs using metal halide perovskites and related materials.
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Details
- Title
- Solution Processed Bilayer Metal Halide White Light Emitting Diodes
- Publication Details
- Advanced materials (Weinheim), Vol.37(25), e2412239
- Resource Type
- Journal article
- Publisher
- Wiley
- Number of pages
- 8
- Grant note
- FSU075000XRAY / National Science Foundation; National Science Foundation (NSF) FSU Office of Research ECCS-2204466; ECCS-1912911 / NSF; National Science Foundation (NSF)
- Copyright
- © 2024 Wiley-VCH GmbH
- Identifiers
- WOS:001354397600001; 99381442986906600
- Academic Unit
- Chemistry; Hal Marcus College of Science and Engineering
- Language
- English