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Research on the stability of luminescence of CsPbBr(3) and Mn:CsPbBr(3) PQDs in polar solution

Mn:CsPbBr(3) PQDs are achieved by hot injection method. As the amount of Mn doping is gradually increased, the photoluminescence (PL) spectra shows a slight blue shift. Mn-doped PQDs exhibit higher quantum efficiency of 83.9% and longer lifetimes of 267 ns. The stability test was performed to assess...

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Autores principales: Jiang, Mou-Ce, Pan, Chun-Yang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9121214/
https://www.ncbi.nlm.nih.gov/pubmed/35693234
http://dx.doi.org/10.1039/d2ra02165j
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author Jiang, Mou-Ce
Pan, Chun-Yang
author_facet Jiang, Mou-Ce
Pan, Chun-Yang
author_sort Jiang, Mou-Ce
collection PubMed
description Mn:CsPbBr(3) PQDs are achieved by hot injection method. As the amount of Mn doping is gradually increased, the photoluminescence (PL) spectra shows a slight blue shift. Mn-doped PQDs exhibit higher quantum efficiency of 83.9% and longer lifetimes of 267 ns. The stability test was performed to assess the susceptibility of the PQDs to polar solutions. It was figured out that although the stabilities of CsPbBr(3) PQDs and Mn-doped PQDs decreased as the polarity of solution increased, Mn-doped PQDs still maintained higher PL intensity than undoped PQD. Notably, 73% PL intensity of Mn:PQDs was maintained which is nearly three times as much as undoped PQDs in water. We found polarity would induce drastic degradation of CsPbBr(3) QDs. The steady-state spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD) verified that CsPbBr(3) QDs tend to aggregate to form larger particles under continuous light soaking. Our work reveals the main origin of instability in CsPbBr(3) QDs and provides reference to engineering such QDs towards optimal device application.
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spelling pubmed-91212142022-06-10 Research on the stability of luminescence of CsPbBr(3) and Mn:CsPbBr(3) PQDs in polar solution Jiang, Mou-Ce Pan, Chun-Yang RSC Adv Chemistry Mn:CsPbBr(3) PQDs are achieved by hot injection method. As the amount of Mn doping is gradually increased, the photoluminescence (PL) spectra shows a slight blue shift. Mn-doped PQDs exhibit higher quantum efficiency of 83.9% and longer lifetimes of 267 ns. The stability test was performed to assess the susceptibility of the PQDs to polar solutions. It was figured out that although the stabilities of CsPbBr(3) PQDs and Mn-doped PQDs decreased as the polarity of solution increased, Mn-doped PQDs still maintained higher PL intensity than undoped PQD. Notably, 73% PL intensity of Mn:PQDs was maintained which is nearly three times as much as undoped PQDs in water. We found polarity would induce drastic degradation of CsPbBr(3) QDs. The steady-state spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD) verified that CsPbBr(3) QDs tend to aggregate to form larger particles under continuous light soaking. Our work reveals the main origin of instability in CsPbBr(3) QDs and provides reference to engineering such QDs towards optimal device application. The Royal Society of Chemistry 2022-05-20 /pmc/articles/PMC9121214/ /pubmed/35693234 http://dx.doi.org/10.1039/d2ra02165j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Jiang, Mou-Ce
Pan, Chun-Yang
Research on the stability of luminescence of CsPbBr(3) and Mn:CsPbBr(3) PQDs in polar solution
title Research on the stability of luminescence of CsPbBr(3) and Mn:CsPbBr(3) PQDs in polar solution
title_full Research on the stability of luminescence of CsPbBr(3) and Mn:CsPbBr(3) PQDs in polar solution
title_fullStr Research on the stability of luminescence of CsPbBr(3) and Mn:CsPbBr(3) PQDs in polar solution
title_full_unstemmed Research on the stability of luminescence of CsPbBr(3) and Mn:CsPbBr(3) PQDs in polar solution
title_short Research on the stability of luminescence of CsPbBr(3) and Mn:CsPbBr(3) PQDs in polar solution
title_sort research on the stability of luminescence of cspbbr(3) and mn:cspbbr(3) pqds in polar solution
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9121214/
https://www.ncbi.nlm.nih.gov/pubmed/35693234
http://dx.doi.org/10.1039/d2ra02165j
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