Composition-Dependent Photoluminescence Properties and Anti-Counterfeiting Applications of A2AgX3 (A = Rb, Cs; X = Cl, Br, I)
Abstract
Copper(I) halides are emerging as attractive alternatives to lead halide perovskites for optical and electronic applications. However, blue-emitting all-inorganic copper(I) halides suffer from poor stability and lack of tunability of their photoluminescence (PL) properties. In this work, the preparation of silver(I) halides A2AgX3 (A = Rb, Cs; X = Cl, Br, I) through solid-state synthesis is reported. In contrast to the Cu(I) analogs, A2AgX3 are broad-band emitters sensitive to A and X site substitutions. First-principle calculations show that defect-bound excitons are responsible for the observed main PL peaks in Rb2AgX3 and that self-trapped excitons (STEs) contribute to a minor PL peak in Rb2AgBr3. This is in sharp contrast to Rb2CuX3, in which the PL is dominated by the emission by STEs. Moreover, the replacement of Cu(I) with Ag(I) in A2AgX3 significantly improves photostability and stability in the air under ambient conditions, which enables their consideration for practical applications. Thus, luminescent inks based on A2AgX3 are prepared and successfully used in anti-counterfeiting applications. The excellent light emission properties, significantly improved stability, simple preparation method, and tunable light emission properties demonstrated by A2AgX3 suggest that silver(I) halides may be attractive alternatives to toxic lead halide perovskites and unstable copper(I) halides for opticalmore »
- Authors:
-
[1];
[3];
[2]
- Univ. of Oklahoma, Norman, OK (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Oklahoma, Norman, OK (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1820749
- Alternate Identifier(s):
- OSTI ID: 1818183; OSTI ID: 1855653
- Grant/Contract Number:
- AC05-00OR22725; DMR-2045490
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Volume: 31; Journal Issue: 48; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; halide perovskites; photoluminescence; silver(I) halides; copper(I) halides; anti-counterfeiting
Citation Formats
Kumar, Pawan, Creason, Tielyr, Fattal, Hadiah, Sharma, Manila, Du, Mao-Hua, and Saparov, Bayrammurad. Composition-Dependent Photoluminescence Properties and Anti-Counterfeiting Applications of A2AgX3 (A = Rb, Cs; X = Cl, Br, I). United States: N. p., 2021.
Web. doi:10.1002/adfm.202104941.
Kumar, Pawan, Creason, Tielyr, Fattal, Hadiah, Sharma, Manila, Du, Mao-Hua, & Saparov, Bayrammurad. Composition-Dependent Photoluminescence Properties and Anti-Counterfeiting Applications of A2AgX3 (A = Rb, Cs; X = Cl, Br, I). United States. https://doi.org/10.1002/adfm.202104941
Kumar, Pawan, Creason, Tielyr, Fattal, Hadiah, Sharma, Manila, Du, Mao-Hua, and Saparov, Bayrammurad. Wed .
"Composition-Dependent Photoluminescence Properties and Anti-Counterfeiting Applications of A2AgX3 (A = Rb, Cs; X = Cl, Br, I)". United States. https://doi.org/10.1002/adfm.202104941. https://www.osti.gov/servlets/purl/1820749.
@article{osti_1820749,
title = {Composition-Dependent Photoluminescence Properties and Anti-Counterfeiting Applications of A2AgX3 (A = Rb, Cs; X = Cl, Br, I)},
author = {Kumar, Pawan and Creason, Tielyr and Fattal, Hadiah and Sharma, Manila and Du, Mao-Hua and Saparov, Bayrammurad},
abstractNote = {Copper(I) halides are emerging as attractive alternatives to lead halide perovskites for optical and electronic applications. However, blue-emitting all-inorganic copper(I) halides suffer from poor stability and lack of tunability of their photoluminescence (PL) properties. In this work, the preparation of silver(I) halides A2AgX3 (A = Rb, Cs; X = Cl, Br, I) through solid-state synthesis is reported. In contrast to the Cu(I) analogs, A2AgX3 are broad-band emitters sensitive to A and X site substitutions. First-principle calculations show that defect-bound excitons are responsible for the observed main PL peaks in Rb2AgX3 and that self-trapped excitons (STEs) contribute to a minor PL peak in Rb2AgBr3. This is in sharp contrast to Rb2CuX3, in which the PL is dominated by the emission by STEs. Moreover, the replacement of Cu(I) with Ag(I) in A2AgX3 significantly improves photostability and stability in the air under ambient conditions, which enables their consideration for practical applications. Thus, luminescent inks based on A2AgX3 are prepared and successfully used in anti-counterfeiting applications. The excellent light emission properties, significantly improved stability, simple preparation method, and tunable light emission properties demonstrated by A2AgX3 suggest that silver(I) halides may be attractive alternatives to toxic lead halide perovskites and unstable copper(I) halides for optical applications.},
doi = {10.1002/adfm.202104941},
journal = {Advanced Functional Materials},
number = 48,
volume = 31,
place = {United States},
year = {Wed Sep 01 00:00:00 EDT 2021},
month = {Wed Sep 01 00:00:00 EDT 2021}
}
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