Bright Structural‐Phase‐Pure CsPbI3 Core‐PbSO4 Shell Nanoplatelets With Ultra‐Narrow Emission Bandwidth of 77 meV at 630 nm

Achieving a narrow emission bandwidth is long pursued for display applications. Among all primary colors, obtaining pure red emission with high visual perception is the most challenging. In this work, CsPbI3 halide perovskite nanoplatelets (NPLs) with rigorously controlled 2D  [PbI6]4− octahedron la...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2024-12, Vol.20 (49), p.e2404573-n/a
Main Authors: Tsai, Ping‐Hsun, Liao, Tzu‐Hao, Chuang, Yung‐Tang, Jan, Pei‐En, Lin, Hao‐Cheng, Tan, Guang‐Hsun, Hsiao, Kai‐Yuan, Lu, Ming‐Yen, Lai, Hoong‐Lien, Chiu, Po‐Wei, Sun, Sheng‐Yuan, Li, Yun‐Li, Lin, Hao‐Wu
Format: Article
Language:English
Subjects:
Brightness
Color
core–shell
CsPbI3
Homogeneity
inorganic halide perovskite
Light emitting diodes
nanoplatelets
Perovskites
Photoluminescence
Platelets (materials)
Quantum confinement
Quantum efficiency
rec. 2020 pure red
Shells (structural forms)
Spectral emittance
Stability
structural phase‐pure
Thickness
Visual perception
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Summary:Achieving a narrow emission bandwidth is long pursued for display applications. Among all primary colors, obtaining pure red emission with high visual perception is the most challenging. In this work, CsPbI3 halide perovskite nanoplatelets (NPLs) with rigorously controlled 2D  [PbI6]4− octahedron layer number (n) are demonstrated. A perovskite core‐PbSO4 shell structure is designed to prevent aggregation and fusion between NPLs, enabling consistent thickness and quantum confinement strength for each NPL. Consequently, exact n = 4 CsPbI3 NPLs are demonstrated, exhibiting emission peaks around 630 nm, with very narrow spectral bandwidths of
ISSN:1613-6810
1613-6829
1613-6829
DOI:10.1002/smll.202404573