Trap-Mediated Sensitization Governs Near-Infrared Emission from Yb3+-Doped Mixed-Halide CsPbCl x Br3-x Perovskite Nanocrystals
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F24%3A10254879" target="_blank" >RIV/61989100:27740/24:10254879 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acs.nanolett.3c04881" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.nanolett.3c04881</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.nanolett.3c04881" target="_blank" >10.1021/acs.nanolett.3c04881</a>
Alternative languages
Result language
angličtina
Original language name
Trap-Mediated Sensitization Governs Near-Infrared Emission from Yb3+-Doped Mixed-Halide CsPbCl x Br3-x Perovskite Nanocrystals
Original language description
Understanding the photosensitization mechanisms in Yb3+-doped perovskite nanocrystals is crucial for developing their anticipated photonic applications. Here, we address this question by investigating near-infrared photoluminescence of Yb3+-doped mixed-halide CsPbClxBr3-x nanocrystals as a function of temperature and revealing its strong dependence on the stoichiometry of the host perovskite matrix. To explain the observed experimental trends, we developed a theoretical model in which energy transfer from the perovskite matrix to Yb3+ ions occurs through intermediate trap states situated beneath the conduction band of the host. The developed model provides an excellent agreement with experimental results and is further validated through the measurements of emission saturation at high excitation powers and near-infrared photoluminescence quantum yield as a function of the anion composition. Our findings establish trap-mediated energy transfer as a dominant photosensitization mechanism in Yb3+-doped CsPbClxBr3-x nanocrystals and open up new ways of engineering their optical properties for light-emitting and light-harvesting applications.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10400 - Chemical sciences
Result continuities
Project
—
Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nano Letters
ISSN
1530-6984
e-ISSN
1530-6992
Volume of the periodical
24
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
3347-3354
UT code for WoS article
001181215600001
EID of the result in the Scopus database
2-s2.0-85187384091