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Title: Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs 3Cu 2Br 5–xI x(0 ≤ x ≤ 5)

Abstract

Recently, interest in developing efficient, low-cost, nontoxic, and stable metal halide emitters that can be incorporated into solid-state lighting technologies has taken hold. Here we report nontoxic, stable, and highly efficient blue-light-emitting Cs 3Cu 2Br 5–xI x (0 ≤ x ≤ 5). Room-temperature photoluminescence measurements show bright blue emission in the 456 to 443 nm range with near-unity quantum yield for Cs 3Cu 2I 5. Here, density functional theory calculations and power-dependent PL measurements suggest that the emission results from self-trapped excitons induced by strong charge localization within the zero-dimensional cluster structure of Cs 3Cu 2Br 5–xI x.

Authors:
 [1]; ORCiD logo [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [1]
  1. Univ. of Oklahoma, Norman, OK (United States)
  2. Bar-Ilan Univ., Ramat-Gan (Israel)
  3. Beihang Univ., Beijing (China)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1507857
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Electronic Materials
Additional Journal Information:
Journal Volume: 1; Journal Issue: 3; Journal ID: ISSN 2637-6113
Publisher:
ACS Publications
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 0D all-inorganic metal halides; density functional theory; high blue photoluminescence quantum yield; Pb-free; thermal and air stability

Citation Formats

Roccanova, Rachel, Yangui, Aymen, Nhalil, Hariharan, Shi, Hongliang, Du, Mao -Hua, and Saparov, Bayrammurad. Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs3Cu2Br5–xIx(0 ≤ x ≤ 5). United States: N. p., 2019. Web. doi:10.1021/acsaelm.9b00015.
Roccanova, Rachel, Yangui, Aymen, Nhalil, Hariharan, Shi, Hongliang, Du, Mao -Hua, & Saparov, Bayrammurad. Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs3Cu2Br5–xIx(0 ≤ x ≤ 5). United States. doi:10.1021/acsaelm.9b00015.
Roccanova, Rachel, Yangui, Aymen, Nhalil, Hariharan, Shi, Hongliang, Du, Mao -Hua, and Saparov, Bayrammurad. Mon . "Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs3Cu2Br5–xIx(0 ≤ x ≤ 5)". United States. doi:10.1021/acsaelm.9b00015.
@article{osti_1507857,
title = {Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs3Cu2Br5–xIx(0 ≤ x ≤ 5)},
author = {Roccanova, Rachel and Yangui, Aymen and Nhalil, Hariharan and Shi, Hongliang and Du, Mao -Hua and Saparov, Bayrammurad},
abstractNote = {Recently, interest in developing efficient, low-cost, nontoxic, and stable metal halide emitters that can be incorporated into solid-state lighting technologies has taken hold. Here we report nontoxic, stable, and highly efficient blue-light-emitting Cs3Cu2Br5–xIx (0 ≤ x ≤ 5). Room-temperature photoluminescence measurements show bright blue emission in the 456 to 443 nm range with near-unity quantum yield for Cs3Cu2I5. Here, density functional theory calculations and power-dependent PL measurements suggest that the emission results from self-trapped excitons induced by strong charge localization within the zero-dimensional cluster structure of Cs3Cu2Br5–xIx.},
doi = {10.1021/acsaelm.9b00015},
journal = {ACS Applied Electronic Materials},
number = 3,
volume = 1,
place = {United States},
year = {2019},
month = {3}
}

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This content will become publicly available on March 11, 2020
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