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https://hdl.handle.net/1822/91189
Título: | Statistical analysis of photoluminescence decay kinetics in quantum dot ensembles: Effects of inorganic shell composition and environment |
Autor(es): | Martins, João R. Krivenkov, Victor Bernardo, César R. Samokhvalov, Pavel Nabiev, Igor Rakovich, Yury P. Vasilevskiy, Mikhail |
Data: | 2022 |
Editora: | American Chemical Society |
Revista: | Journal of Physical Chemistry C |
Citação: | Martins, J. R., Krivenkov, V., Bernardo, C. R., Samokhvalov, P., Nabiev, I., Rakovich, Y. P., & Vasilevskiy, M. I. (2022, November 22). Statistical Analysis of Photoluminescence Decay Kinetics in Quantum Dot Ensembles: Effects of Inorganic Shell Composition and Environment. The Journal of Physical Chemistry C. American Chemical Society (ACS). http://doi.org/10.1021/acs.jpcc.2c06134 |
Resumo(s): | Discerning the kinetics of photoluminescence (PL) decay of packed quantum dots (QDs) and QD-based hybrid materials is of crucial importance for achieving their promising potential. However, the interpretation of the decay kinetics of QD-based systems, which usually are not single-exponential, remains challenging. Here, we present a method for analyzing photoluminescence (PL) decay curves of fluorophores by studying their statistical moments. A certain combination of such moments, named as the n-th order moments' ratio, R n , is studied for several theoretical decay curves and experimental PL kinetics of CdSe quantum dots (QDs) acquired by time-correlated single photon counting (TCSPC). For the latter, three different case studies using the R n ratio analysis are presented, namely, (i) the effect of the inorganic shell composition and thickness of the core-shell QDs, (ii) QD systems with Förster resonance energy transfer (FRET) decay channels, and (iii) system of QDs near a layer of plasmonic nanoparticles. The proposed method is shown to be efficient for the detection of slight changes in the PL kinetics, being time-efficient and requiring low computing power for performing the analysis. It can also be a powerful tool to identify the most appropriate physically meaningful theoretical decay function, which best describes the systems under study. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/91189 |
DOI: | 10.1021/acs.jpcc.2c06134 |
ISSN: | 1932-7447 |
e-ISSN: | 1932-7455 |
Versão da editora: | https://pubs.acs.org/doi/10.1021/acs.jpcc.2c06134 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | PHYSICS OF QUANTUM MATERIALS AND BIONANOSTRUCTURES (2018 - ...) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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martins-et-al-2022-statistical-analysis-of-photoluminescence-decay-kinetics-in-quantum-dot-ensembles-effects-of.pdf | published | 6,14 MB | Adobe PDF | Ver/Abrir |