Bulk Assembly of Zero-Dimensional Organic Lead Bromide Hybrid with Efficient Blue Emission

Haoran Lin; Chenkun Zhou; Maya Chaaban; Liang Jin Xu; Yan Zhou; Jennifer Neu; Michael Worku; Ella Berkwits; Qingquan He; Sujin Lee; Xinsong Lin; Theo Siegrist; Mao Hua Du; Biwu Ma

doi:10.1021/acsmaterialslett.9b00333

Bulk Assembly of Zero-Dimensional Organic Lead Bromide Hybrid with Efficient Blue Emission

Haoran Lin, Chenkun Zhou, Maya Chaaban, Liang Jin Xu, Yan Zhou, Jennifer Neu, Michael Worku, Ella Berkwits, Qingquan He, Sujin Lee, Xinsong Lin, Theo Siegrist, Mao Hua Du, Biwu Ma

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106 Scopus citations

Abstract

Zero-dimensional (0D) organic metal halide hybrids are an emerging class of light emitting materials with exceptional photoluminescence quantum efficiencies (PLQEs), thanks to their perfect "host-guest"structures with light emitting metal halide species periodically "embedded"in a wide band gap organic cationic matrix through ionic bonds. However, achieving efficient blue emissions is challenging for this class of materials, as structural distortions of metal halides often lead to large Stokes shifts. Here we report a highly luminescent blue emitting 0D organic lead bromide, (C13H19N4)2PbBr4, with a peak emission of 460 nm (2.70 eV), a full width at half maximum (FWHM) of 66 nm (0.40 eV), a Stokes shift of 111 nm (0.85 eV), and a PLQE of ∼40%. Single crystal structure analysis shows that individual PbBr42- species adopt a near-seesaw structure, which are coordinated to benzyl-hexamethylenetetrammonium (C13H19N4+) organic cations. The relatively small Stokes shift as compared to those of previously reported 0D organic metal halide hybrids are attributed to the low chemical reactivity of Pb 6s2 lone pairs and the rigid organic cationic matrix. (C13H19N4)2PbBr4 also shows exceptional stability in air with little-to-no change of properties for more than a year in ambient conditions.

Original language	English
Pages (from-to)	594-598
Number of pages	5
Journal	ACS Materials Letters
Volume	1
Issue number	6
DOIs	https://doi.org/10.1021/acsmaterialslett.9b00333
State	Published - Dec 2 2019
Externally published	Yes

Funding

The work was supported by the Air Force Office of Scientific Research (AFOSR) (17RT0906) and the National Science Foundation (DMR-1709116, CHE-1664661). J.N. acknowledges support from the National Science Foundation under grant NSF-DMR-1606952. Part of the work was carried out at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation under NSF DMR-1644779 and the State of Florida. M. -H. Du was supported by the U. S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. The authors thank Dr. Kenneth Hanson for help with emission measurements.

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title = "Bulk Assembly of Zero-Dimensional Organic Lead Bromide Hybrid with Efficient Blue Emission",

abstract = "Zero-dimensional (0D) organic metal halide hybrids are an emerging class of light emitting materials with exceptional photoluminescence quantum efficiencies (PLQEs), thanks to their perfect {"}host-guest{"}structures with light emitting metal halide species periodically {"}embedded{"}in a wide band gap organic cationic matrix through ionic bonds. However, achieving efficient blue emissions is challenging for this class of materials, as structural distortions of metal halides often lead to large Stokes shifts. Here we report a highly luminescent blue emitting 0D organic lead bromide, (C13H19N4)2PbBr4, with a peak emission of 460 nm (2.70 eV), a full width at half maximum (FWHM) of 66 nm (0.40 eV), a Stokes shift of 111 nm (0.85 eV), and a PLQE of ∼40%. Single crystal structure analysis shows that individual PbBr42- species adopt a near-seesaw structure, which are coordinated to benzyl-hexamethylenetetrammonium (C13H19N4+) organic cations. The relatively small Stokes shift as compared to those of previously reported 0D organic metal halide hybrids are attributed to the low chemical reactivity of Pb 6s2 lone pairs and the rigid organic cationic matrix. (C13H19N4)2PbBr4 also shows exceptional stability in air with little-to-no change of properties for more than a year in ambient conditions.",

author = "Haoran Lin and Chenkun Zhou and Maya Chaaban and Xu, {Liang Jin} and Yan Zhou and Jennifer Neu and Michael Worku and Ella Berkwits and Qingquan He and Sujin Lee and Xinsong Lin and Theo Siegrist and Du, {Mao Hua} and Biwu Ma",

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doi = "10.1021/acsmaterialslett.9b00333",

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AU - Lin, Haoran

AU - Zhou, Chenkun

AU - Chaaban, Maya

AU - Xu, Liang Jin

AU - Zhou, Yan

AU - Neu, Jennifer

AU - Worku, Michael

AU - Berkwits, Ella

AU - He, Qingquan

AU - Lee, Sujin

AU - Lin, Xinsong

AU - Siegrist, Theo

AU - Du, Mao Hua

AU - Ma, Biwu

PY - 2019/12/2

Y1 - 2019/12/2

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AB - Zero-dimensional (0D) organic metal halide hybrids are an emerging class of light emitting materials with exceptional photoluminescence quantum efficiencies (PLQEs), thanks to their perfect "host-guest"structures with light emitting metal halide species periodically "embedded"in a wide band gap organic cationic matrix through ionic bonds. However, achieving efficient blue emissions is challenging for this class of materials, as structural distortions of metal halides often lead to large Stokes shifts. Here we report a highly luminescent blue emitting 0D organic lead bromide, (C13H19N4)2PbBr4, with a peak emission of 460 nm (2.70 eV), a full width at half maximum (FWHM) of 66 nm (0.40 eV), a Stokes shift of 111 nm (0.85 eV), and a PLQE of ∼40%. Single crystal structure analysis shows that individual PbBr42- species adopt a near-seesaw structure, which are coordinated to benzyl-hexamethylenetetrammonium (C13H19N4+) organic cations. The relatively small Stokes shift as compared to those of previously reported 0D organic metal halide hybrids are attributed to the low chemical reactivity of Pb 6s2 lone pairs and the rigid organic cationic matrix. (C13H19N4)2PbBr4 also shows exceptional stability in air with little-to-no change of properties for more than a year in ambient conditions.

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Bulk Assembly of Zero-Dimensional Organic Lead Bromide Hybrid with Efficient Blue Emission

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