Deciphering the role of quantum dot size in the ultrafast charge carrier dynamics at the perovskite-quantum dot interface

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00539182" target="_blank" >RIV/68378271:_____/20:00539182 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1039/d0tc03835k" target="_blank" >https://doi.org/10.1039/d0tc03835k</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d0tc03835k" target="_blank" >10.1039/d0tc03835k</a>

Result language
angličtina
Original language name
Deciphering the role of quantum dot size in the ultrafast charge carrier dynamics at the perovskite-quantum dot interface
Original language description
Deciphering the electron and hole (e, h) dynamics at the interfaces of photoexcited hybrid materials at different densities of photoexcited charge carriers is paramount to the development of efficient optoelectronic devices. Nanocomposites formed by methylammonium lead iodide perovskite (PS) and semiconductor colloidal quantum dots (QDs) are among these hybrid materials under intensive studies. However, the reciprocal influence of the components in the composite on the charge carriers’ dynamics is still poorly explored. We unraveled the effect of PbS QD size, embedded in the PS matrix, on the e and h diffusion, transfer to the QD phase and recombination. While the decays are dominated by e and h transition from PS to QDs, the increase in the QD size results in an acceleration of the charge carriers’ transitions represented by the total transfer rate constants of electrons and holes. We extract the diffusion times and transfer rate constants to the interfaces.n
Czech name
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Czech description
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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
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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