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Regulating Exciton–Phonon Coupling to Achieve a Near‐Unity Photoluminescence Quantum Yield in One‐Dimensional Hybrid Metal Halides
- Source :
- Advanced Science, Vol 8, Iss 14, Pp n/a-n/a (2021), Advanced Science
- Publication Year :
- 2021
- Publisher :
- Wiley, 2021.
-
Abstract
- Low‐dimensional hybrid metal halides are emerging as a highly promising class of single‐component white‐emitting materials for their unique broadband emission from self‐trapped excitons (STEs). Despite substantial progress in the development of these metal halides, many challenges remain to be addressed to obtain a better fundamental understanding of the structure–property relationship and realize the full potentials of this class of materials. Here, via pressure regulation, a near 100% photoluminescence quantum yield (PLQY) of broadband emission is achieved in a corrugated 1D hybrid metal halide C5N2H16Pb2Br6, which possesses a highly distorted structure with an initial PLQY of 10%. Compression reduces the overlap between STE states and ground state, leading to a suppressed phonon‐assisted non‐radiative decay. The PL evolution is systematically demonstrated to be controlled by the pressure‐regulated exciton–phonon coupling which can be quantified using Huang–Rhys factor S. Detailed studies of the S‐PLQY relation for a series of 1D hybrid metal halides (C5N2H16Pb2Br6, C4N2H14PbBr4, C6N2H16PbBr4, and (C6N2H16)3Pb2Br10) reveal a quantitative structure–property relationship that regulating S factor toward 28 leads to the maximum emission.<br />This work demonstrates a quantitative relationship between photoluminescence quantum yield (PLQY) and exciton–phonon coupling in a series of 1D hybrid metal halides. Using pressure to regulate the exciton–phonon interaction, a near 100% PLQY of broadband emission from self‐trapped excitons is achieved in a corrugated 1D compound C5N2H16Pb2Br6 whose initial PLQY is 10%.
- Subjects :
- Photoluminescence
Materials science
pressure regulation
Phonon
General Chemical Engineering
Exciton
Science
General Physics and Astronomy
Medicine (miscellaneous)
Quantum yield
Halide
02 engineering and technology
010402 general chemistry
01 natural sciences
Biochemistry, Genetics and Molecular Biology (miscellaneous)
chemistry.chemical_compound
Metal halides
General Materials Science
1D hybrid metal halides
Research Articles
Coupling
Huang–Rhys factor
General Engineering
021001 nanoscience & nanotechnology
0104 chemical sciences
self‐trapped excitons
chemistry
Chemical physics
exciton–phonon coupling
0210 nano-technology
Ground state
Research Article
Subjects
Details
- Language :
- English
- ISSN :
- 21983844
- Volume :
- 8
- Issue :
- 14
- Database :
- OpenAIRE
- Journal :
- Advanced Science
- Accession number :
- edsair.doi.dedup.....37f59d1e479e9d8976e2a7966e545a43