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

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

doi:10.1021/acsmaterialslett.9b00333

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

Journal Article · Mon Oct 21 00:00:00 EDT 2019 · ACS Materials Letters

DOI:https://doi.org/10.1021/acsmaterialslett.9b00333· OSTI ID:1607040

Lin, Haoran ^[1];

^[2]; Chaaban, Maya ^[1]; Xu, Liang-Jin ^[1];

^[1]; Neu, Jennifer ^[1]; Worku, Michael ^[1]; Berkwits, Ella ^[1]; He, Qingquan ^[1]; Lee, Sujin ^[1]; Lin, Xinsong ^[1]; Siegrist, Theo ^[1];

^[3];

^[4]

Florida State Univ., Tallahassee, FL (United States)
FAMU-FSU College of Engineering, Tallahassee, FL (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Florida State Univ., Tallahassee, FL (United States); FAMU-FSU College of Engineering, Tallahassee, FL (United States)

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 PbBr₄^2– 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. Finally, (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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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR)

Grant/Contract Number:: AC05-00OR22725; 17RT0906; DMR-1709116; CHE-1664661; DMR-1606952; DMR-1644779

OSTI ID:: 1607040

Journal Information:: ACS Materials Letters, Vol. 1, Issue 6; ISSN 2639-4979

Publisher:: ACS PublicationsCopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

Microscopic origin of multiple exciton emission in low-dimensional lead halide perovskites Du, Mao-Hua The Journal of Chemical Physics, Vol. 151, Issue 18 https://doi.org/10.1063/1.5127933	journal	November 2019
Charge transfer between lead halide perovskite nanocrystals and single-walled carbon nanotubes Bansal, Parul; Zhang, Xiangtong; Wang, Hua Nanoscale Advances, Vol. 2, Issue 2 https://doi.org/10.1039/c9na00766k	journal	January 2020

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