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Formation and enhancement of negative thermal quenching in emission of KGdF(4):Eu(3+), Yb(3+)@GQDs
In order to obtain a red emitting phosphor with good luminescence thermal stability, a series of KGdF(4):Eu(3+), Yb(3+)@GQD (GQD: Cl-containing graphene quantum dots) red emitting phosphors have been synthesized by the co-precipitation method, and their luminescence thermal properties have also been...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9043440/ https://www.ncbi.nlm.nih.gov/pubmed/35492796 http://dx.doi.org/10.1039/d1ra07413j |
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author | Wu, Zhigao Chen, Chang Wang, Yaxiong Luo, Chaolian Liao, Sen Huang, Yingheng Ming, Junyu |
author_facet | Wu, Zhigao Chen, Chang Wang, Yaxiong Luo, Chaolian Liao, Sen Huang, Yingheng Ming, Junyu |
author_sort | Wu, Zhigao |
collection | PubMed |
description | In order to obtain a red emitting phosphor with good luminescence thermal stability, a series of KGdF(4):Eu(3+), Yb(3+)@GQD (GQD: Cl-containing graphene quantum dots) red emitting phosphors have been synthesized by the co-precipitation method, and their luminescence thermal properties have also been studied in detail. It is intriguing that the negative thermal quenching (NTQ) effect is induced by the double doping of Yb(3+), and the effect is further enhanced by GQD coating. The strongest integrated PL intensities of the optimal double doped sample and the optimal GQD-coated sample are at 130 and 170 °C, in which the corresponding integrated PL intensities are presented as 117.7 and 156.5% of the initial value at 30 °C, respectively. The NTQ effect makes the optimal GQD coated sample have good luminescent thermal stability, so it can be applied for high-power WLEDs. A mechanism of energy conversion from heat to light is discussed and suggested for the effect. |
format | Online Article Text |
id | pubmed-9043440 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90434402022-04-28 Formation and enhancement of negative thermal quenching in emission of KGdF(4):Eu(3+), Yb(3+)@GQDs Wu, Zhigao Chen, Chang Wang, Yaxiong Luo, Chaolian Liao, Sen Huang, Yingheng Ming, Junyu RSC Adv Chemistry In order to obtain a red emitting phosphor with good luminescence thermal stability, a series of KGdF(4):Eu(3+), Yb(3+)@GQD (GQD: Cl-containing graphene quantum dots) red emitting phosphors have been synthesized by the co-precipitation method, and their luminescence thermal properties have also been studied in detail. It is intriguing that the negative thermal quenching (NTQ) effect is induced by the double doping of Yb(3+), and the effect is further enhanced by GQD coating. The strongest integrated PL intensities of the optimal double doped sample and the optimal GQD-coated sample are at 130 and 170 °C, in which the corresponding integrated PL intensities are presented as 117.7 and 156.5% of the initial value at 30 °C, respectively. The NTQ effect makes the optimal GQD coated sample have good luminescent thermal stability, so it can be applied for high-power WLEDs. A mechanism of energy conversion from heat to light is discussed and suggested for the effect. The Royal Society of Chemistry 2021-11-09 /pmc/articles/PMC9043440/ /pubmed/35492796 http://dx.doi.org/10.1039/d1ra07413j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Wu, Zhigao Chen, Chang Wang, Yaxiong Luo, Chaolian Liao, Sen Huang, Yingheng Ming, Junyu Formation and enhancement of negative thermal quenching in emission of KGdF(4):Eu(3+), Yb(3+)@GQDs |
title | Formation and enhancement of negative thermal quenching in emission of KGdF(4):Eu(3+), Yb(3+)@GQDs |
title_full | Formation and enhancement of negative thermal quenching in emission of KGdF(4):Eu(3+), Yb(3+)@GQDs |
title_fullStr | Formation and enhancement of negative thermal quenching in emission of KGdF(4):Eu(3+), Yb(3+)@GQDs |
title_full_unstemmed | Formation and enhancement of negative thermal quenching in emission of KGdF(4):Eu(3+), Yb(3+)@GQDs |
title_short | Formation and enhancement of negative thermal quenching in emission of KGdF(4):Eu(3+), Yb(3+)@GQDs |
title_sort | formation and enhancement of negative thermal quenching in emission of kgdf(4):eu(3+), yb(3+)@gqds |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9043440/ https://www.ncbi.nlm.nih.gov/pubmed/35492796 http://dx.doi.org/10.1039/d1ra07413j |
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