Creating chromaticity palettes and identifying white light emitters through nanocrystal megalibraries

Tong Cai; Donghoon Shin; Jun Li; David D. Xu; Jacob Pietryga; Ye Zhang; Chad A. Mirkin

doi:10.1126/sciadv.ads4453

Creating chromaticity palettes and identifying white light emitters through nanocrystal megalibraries

Tong Cai, Donghoon Shin, Jun Li, David D. Xu, Jacob Pietryga, Ye Zhang, Chad A. Mirkin^*

^*Corresponding author for this work

Chemistry

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

3 Scopus citations

Abstract

Halide perovskites are used to fabricate energy-efficient optoelectronic devices. Determining which compositions yield desired chromatic responses is challenging, especially when doping strategies are used. Here, we report a way of mapping the compositional space of halide perovskites to generate a light emission or “chromaticity” palette. Megalibraries consisting of millions of Mn²⁺-doped PEA₂PbX₄ (PEA: phenethylammonium, X: halide anions) perovskite nanocrystals were synthesized to screen the compositions that led to specific emission profiles. The chromaticity palette allows one to identify single-composition white light emitters [PEA₂Pb₁_−yMn_y(Br₁_−xI_x)₄ (0 ≤ x ≤ 1, 0 ≤ y ≤ 1)], eliminating the need for trilayer structures in conventional white light-emitting diodes, which are prone to instability and complex device designs. Optical studies reveal that the dual-wavelength photoluminescence emission originates from exciton recombination and energy transfer processes. This study shows how emerging megalibrary capabilities can rapidly advance our understanding of the complex composition-structure-function relationships and be used to accelerate the discovery of next-generation optoelectronic materials.

Original language	English (US)
Article number	eads4453
Journal	Science Advances
Volume	11
Issue number	3
DOIs	https://doi.org/10.1126/sciadv.ads4453
State	Published - Jan 17 2025

Funding

: We thank S. h. Petrosko (northwestern University) for providing editorial input : Research was sponsored by the Army Research Office grants W911nF-23-1-0141 and W911nF-23-1-0285, the Air Force Office of Scientific Research award FA9550-22-1-0300, the toyota Research institute inc., and the Sherman Fairchild Foundation inc. J.P. acknowledges support by the national Science Foundation Graduate Research Fellowship under grant no. nSF deG-2234667. this work made use of the ePiC, SPid, and nUFAB facility of northwestern University\u2019s nUAnCe Center, which has received support from the Shyne Resource (nSF eCCS-2025633), the iin, and northwestern\u2019s MRSeC program (nSF dMR-2308691). leica SP8 confocal microscopy was performed at the Biological imaging Facility at northwestern University (RRid:SCR_017767), supported by the Chemistry for life Processes institute, the nU Office for Research, the department of Molecular Biosciences, and the Rice Foundation. leica MP SP8 confocal microscopy and lifetime measurement were performed at the northwestern University Center for Advanced Microscopy supported by nCi CCSG P30 CA060553 awarded to the Robert h. lurie Comprehensive Cancer Center.

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title = "Creating chromaticity palettes and identifying white light emitters through nanocrystal megalibraries",

abstract = "Halide perovskites are used to fabricate energy-efficient optoelectronic devices. Determining which compositions yield desired chromatic responses is challenging, especially when doping strategies are used. Here, we report a way of mapping the compositional space of halide perovskites to generate a light emission or “chromaticity” palette. Megalibraries consisting of millions of Mn2+-doped PEA2PbX4 (PEA: phenethylammonium, X: halide anions) perovskite nanocrystals were synthesized to screen the compositions that led to specific emission profiles. The chromaticity palette allows one to identify single-composition white light emitters [PEA2Pb1−yMny(Br1−xIx)4 (0 ≤ x ≤ 1, 0 ≤ y ≤ 1)], eliminating the need for trilayer structures in conventional white light-emitting diodes, which are prone to instability and complex device designs. Optical studies reveal that the dual-wavelength photoluminescence emission originates from exciton recombination and energy transfer processes. This study shows how emerging megalibrary capabilities can rapidly advance our understanding of the complex composition-structure-function relationships and be used to accelerate the discovery of next-generation optoelectronic materials.",

author = "Tong Cai and Donghoon Shin and Jun Li and Xu, {David D.} and Jacob Pietryga and Ye Zhang and Mirkin, {Chad A.}",

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AU - Shin, Donghoon

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AU - Mirkin, Chad A.

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Creating chromaticity palettes and identifying white light emitters through nanocrystal megalibraries

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