Single-Layer Sheets of Alkylammonium Lead Iodide Perovskites with Tunable and Stable Green Emission for White Light-Emitting Devices

Chuying Wang; Ya Kun Wang; Ziliang Li; Jingwei Luo; Randy Sabatini; Tao Zhang; Edward H. Sargent; Zhengtao Deng

doi:10.1002/adom.202200217

Single-Layer Sheets of Alkylammonium Lead Iodide Perovskites with Tunable and Stable Green Emission for White Light-Emitting Devices

Chuying Wang, Ya Kun Wang, Ziliang Li, Jingwei Luo, Randy Sabatini, Tao Zhang, Edward H. Sargent, Zhengtao Deng^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Recently, metal halide perovskites have attracted considerable interest as highly emissive phosphors for use in white light-emitting diodes (WLEDs). In perovskites, the migration of halide anions between green-emitting bromide (e.g., CsPbBr₃) and red-emitting iodide (e.g., CsPbI₃) materials is one obstacle to application. Here perovskite WLEDs that do not suffer from the anion exchange problem are reported: this is done by developing green-emitting single-layer sheets of (RNH₃)₂PbI₄ (R = C₁₈H₃₅–, C₁₂H₂₅–, and C₈H₁₇–) and uniting these with red-emitting CsPbI₃ perovskite quantum dots (QDs). It relies on self-assembly from ligand-capped CsPbI₃ nanocrystals to form single-layer sheets of (C₁₈H₃₅NH₃)₂PbI₄: via judicious selection of alkylamines and alkyl acids, (RNH₃)₂PbI₄ single-layer sheets that exhibit bright and stable green emission with well-defined single-layer thickness are produced. Emission from 505, 512 to 536 nm is tuned and a narrow (<20 nm) linewidth is retained. Perovskite LEDs that produce white light with chromaticity coordinates (0.32, 0.33) and color gamut that reaches 117% National Television System Committee (NTSC) in the International Commission on Illumination (CIE) 1931 color space are demonstrated.

Original language	English (US)
Article number	2200217
Journal	Advanced Optical Materials
Volume	10
Issue number	16
DOIs	https://doi.org/10.1002/adom.202200217
State	Published - Aug 18 2022

Funding

The authors would like to thank Qian Wang of Nanjing University for acquiring the AFM images. This work was supported by the National Natural Science Foundation of China (22075129). This publication is also based in part on work supported by the Ontario-Jiangsu Industrial R&D Program (OJIRDP). The authors would like to thank Qian Wang of Nanjing University for acquiring the AFM images. This work was supported by the National Natural Science Foundation of China (22075129). This publication is also based in part on work supported by the Ontario‐Jiangsu Industrial R&D Program (OJIRDP).

Keywords

alkylammonium lead iodide perovskites
fluorescence
single-layer sheets
stability
white light emitting diodes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics

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10.1002/adom.202200217

Cite this

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title = "Single-Layer Sheets of Alkylammonium Lead Iodide Perovskites with Tunable and Stable Green Emission for White Light-Emitting Devices",

abstract = "Recently, metal halide perovskites have attracted considerable interest as highly emissive phosphors for use in white light-emitting diodes (WLEDs). In perovskites, the migration of halide anions between green-emitting bromide (e.g., CsPbBr3) and red-emitting iodide (e.g., CsPbI3) materials is one obstacle to application. Here perovskite WLEDs that do not suffer from the anion exchange problem are reported: this is done by developing green-emitting single-layer sheets of (RNH3)2PbI4 (R = C18H35–, C12H25–, and C8H17–) and uniting these with red-emitting CsPbI3 perovskite quantum dots (QDs). It relies on self-assembly from ligand-capped CsPbI3 nanocrystals to form single-layer sheets of (C18H35NH3)2PbI4: via judicious selection of alkylamines and alkyl acids, (RNH3)2PbI4 single-layer sheets that exhibit bright and stable green emission with well-defined single-layer thickness are produced. Emission from 505, 512 to 536 nm is tuned and a narrow (<20 nm) linewidth is retained. Perovskite LEDs that produce white light with chromaticity coordinates (0.32, 0.33) and color gamut that reaches 117\% National Television System Committee (NTSC) in the International Commission on Illumination (CIE) 1931 color space are demonstrated.",

keywords = "alkylammonium lead iodide perovskites, fluorescence, single-layer sheets, stability, white light emitting diodes",

author = "Chuying Wang and Wang, \{Ya Kun\} and Ziliang Li and Jingwei Luo and Randy Sabatini and Tao Zhang and Sargent, \{Edward H.\} and Zhengtao Deng",

note = "Funding Information: The authors would like to thank Qian Wang of Nanjing University for acquiring the AFM images. This work was supported by the National Natural Science Foundation of China (22075129). This publication is also based in part on work supported by the Ontario-Jiangsu Industrial R\&D Program (OJIRDP). Funding Information: The authors would like to thank Qian Wang of Nanjing University for acquiring the AFM images. This work was supported by the National Natural Science Foundation of China (22075129). This publication is also based in part on work supported by the Ontario‐Jiangsu Industrial R\&D Program (OJIRDP). Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",

year = "2022",

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day = "18",

doi = "10.1002/adom.202200217",

language = "English (US)",

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T1 - Single-Layer Sheets of Alkylammonium Lead Iodide Perovskites with Tunable and Stable Green Emission for White Light-Emitting Devices

AU - Wang, Chuying

AU - Wang, Ya Kun

AU - Li, Ziliang

AU - Luo, Jingwei

AU - Sabatini, Randy

AU - Zhang, Tao

AU - Sargent, Edward H.

AU - Deng, Zhengtao

N1 - Funding Information: The authors would like to thank Qian Wang of Nanjing University for acquiring the AFM images. This work was supported by the National Natural Science Foundation of China (22075129). This publication is also based in part on work supported by the Ontario-Jiangsu Industrial R&D Program (OJIRDP). Funding Information: The authors would like to thank Qian Wang of Nanjing University for acquiring the AFM images. This work was supported by the National Natural Science Foundation of China (22075129). This publication is also based in part on work supported by the Ontario‐Jiangsu Industrial R&D Program (OJIRDP). Publisher Copyright: © 2022 Wiley-VCH GmbH.

PY - 2022/8/18

Y1 - 2022/8/18

N2 - Recently, metal halide perovskites have attracted considerable interest as highly emissive phosphors for use in white light-emitting diodes (WLEDs). In perovskites, the migration of halide anions between green-emitting bromide (e.g., CsPbBr3) and red-emitting iodide (e.g., CsPbI3) materials is one obstacle to application. Here perovskite WLEDs that do not suffer from the anion exchange problem are reported: this is done by developing green-emitting single-layer sheets of (RNH3)2PbI4 (R = C18H35–, C12H25–, and C8H17–) and uniting these with red-emitting CsPbI3 perovskite quantum dots (QDs). It relies on self-assembly from ligand-capped CsPbI3 nanocrystals to form single-layer sheets of (C18H35NH3)2PbI4: via judicious selection of alkylamines and alkyl acids, (RNH3)2PbI4 single-layer sheets that exhibit bright and stable green emission with well-defined single-layer thickness are produced. Emission from 505, 512 to 536 nm is tuned and a narrow (<20 nm) linewidth is retained. Perovskite LEDs that produce white light with chromaticity coordinates (0.32, 0.33) and color gamut that reaches 117% National Television System Committee (NTSC) in the International Commission on Illumination (CIE) 1931 color space are demonstrated.

AB - Recently, metal halide perovskites have attracted considerable interest as highly emissive phosphors for use in white light-emitting diodes (WLEDs). In perovskites, the migration of halide anions between green-emitting bromide (e.g., CsPbBr3) and red-emitting iodide (e.g., CsPbI3) materials is one obstacle to application. Here perovskite WLEDs that do not suffer from the anion exchange problem are reported: this is done by developing green-emitting single-layer sheets of (RNH3)2PbI4 (R = C18H35–, C12H25–, and C8H17–) and uniting these with red-emitting CsPbI3 perovskite quantum dots (QDs). It relies on self-assembly from ligand-capped CsPbI3 nanocrystals to form single-layer sheets of (C18H35NH3)2PbI4: via judicious selection of alkylamines and alkyl acids, (RNH3)2PbI4 single-layer sheets that exhibit bright and stable green emission with well-defined single-layer thickness are produced. Emission from 505, 512 to 536 nm is tuned and a narrow (<20 nm) linewidth is retained. Perovskite LEDs that produce white light with chromaticity coordinates (0.32, 0.33) and color gamut that reaches 117% National Television System Committee (NTSC) in the International Commission on Illumination (CIE) 1931 color space are demonstrated.

KW - alkylammonium lead iodide perovskites

KW - fluorescence

KW - single-layer sheets

KW - stability

KW - white light emitting diodes

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ER -

Single-Layer Sheets of Alkylammonium Lead Iodide Perovskites with Tunable and Stable Green Emission for White Light-Emitting Devices

Abstract

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Keywords

ASJC Scopus subject areas

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