Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs3Cu2Br5–xIx(0 ≤ x ≤ 5)

doi:https://doi.org/10.1021/acsaelm.9b00015

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:

Roccanova, Rachel ^[1];

^[1]; Nhalil, Hariharan ^[2]; Shi, Hongliang ^[3];

^[4];

^[1]

Univ. of Oklahoma, Norman, OK (United States)
Bar-Ilan Univ., Ramat-Gan (Israel)
Beihang Univ., Beijing (China)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: 2019-03-11

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1507857

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Journal Article: 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.

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                    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.  https://doi.org/10.1021/acsaelm.9b00015

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                    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.  https://doi.org/10.1021/acsaelm.9b00015.  https://www.osti.gov/servlets/purl/1507857.

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@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},

  url          = {https://www.osti.gov/biblio/1507857},
  journal      = {ACS Applied Electronic Materials},

  issn         = {2637-6113},

  number       = 3,

  volume       = 1,

  place        = {United States},

  year         = {2019},

  month        = {3}

}

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

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