Synthesis of a novel red phosphor K2xBa1-xTiF6:Mn4+ and its enhanced luminescence performance, thermal stability and waterproofness; Journal of Alloys and Compounds; Vol. 808
| Parent link: | Journal of Alloys and Compounds Vol. 808.— 2019.— [151697, 8 p.] |
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| Corporate Authors: | , |
| Other Authors: | , , , , , , , , |
| Summary: | Title screen Investigation of efficient red phosphors is highly desired for the development of novel warm white light emitting diodes. In this paper, through a facile method, we first introduce K+ to replace Ba2+ to synthesize a novel K2xBa1-xTiF6:Mn4+ solid solution phosphor with high luminous efficiency, high thermal stability and good waterproofness. Significantly, compared with two best luminescence performance samples (BaTiF6:0.006Mn4+ and K0.070Ba0.965TiF6:0.018Mn4+), the luminescence intensity of K0.070Ba0.965TiF6:0.018Mn4+ is increased by 6 times, the quantum efficiency is improved from 40% to 75% and the activation energy of thermal quenching is improved to 0.940?eV from 0.628?eV. Remarkably, the waterproofness is improved by 45% than traditional red phosphor K2TiF6:Mn4+ after being immersed in water for 150?min. Moreover, a high-performance WLED with low correlated color temperature (CCT?=?3930?K), high color rendering index (Ra?=?90.3) and luminous efficacy of 105 lm/W is achieved by employing blue-emitting GaN chip, yellow-emitting YAG:Ce3+ phosphor and red-emitting K0.070Ba0.965TiF6:Mn4+ phosphor. These results reveal that introduced suitable cation may have a positive effect on luminescent properties of Mn4+ activated fluoride phosphors, which is a helpful tool for their performance improvement, and K0.070Ba0.965TiF6:Mn4+ presents a good luminescent property and may be a potential candidate for high-performance warm WLED. Режим доступа: по договору с организацией-держателем ресурса |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://doi.org/10.1016/j.jallcom.2019.151697 |
| Format: | xMaterials Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662503 |
MARC
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| 200 | 1 | |a Synthesis of a novel red phosphor K2xBa1-xTiF6:Mn4+ and its enhanced luminescence performance, thermal stability and waterproofness |f Fang Shuangqiang, Khan (Han) Tao, Lang Tianchun [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 44 tit.] | ||
| 330 | |a Investigation of efficient red phosphors is highly desired for the development of novel warm white light emitting diodes. In this paper, through a facile method, we first introduce K+ to replace Ba2+ to synthesize a novel K2xBa1-xTiF6:Mn4+ solid solution phosphor with high luminous efficiency, high thermal stability and good waterproofness. Significantly, compared with two best luminescence performance samples (BaTiF6:0.006Mn4+ and K0.070Ba0.965TiF6:0.018Mn4+), the luminescence intensity of K0.070Ba0.965TiF6:0.018Mn4+ is increased by 6 times, the quantum efficiency is improved from 40% to 75% and the activation energy of thermal quenching is improved to 0.940?eV from 0.628?eV. Remarkably, the waterproofness is improved by 45% than traditional red phosphor K2TiF6:Mn4+ after being immersed in water for 150?min. Moreover, a high-performance WLED with low correlated color temperature (CCT?=?3930?K), high color rendering index (Ra?=?90.3) and luminous efficacy of 105 lm/W is achieved by employing blue-emitting GaN chip, yellow-emitting YAG:Ce3+ phosphor and red-emitting K0.070Ba0.965TiF6:Mn4+ phosphor. These results reveal that introduced suitable cation may have a positive effect on luminescent properties of Mn4+ activated fluoride phosphors, which is a helpful tool for their performance improvement, and K0.070Ba0.965TiF6:Mn4+ presents a good luminescent property and may be a potential candidate for high-performance warm WLED. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Journal of Alloys and Compounds | ||
| 463 | |t Vol. 808 |v [151697, 8 p.] |d 2019 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a Mn4+ | |
| 610 | 1 | |a phosphor | |
| 610 | 1 | |a luminescence performance | |
| 610 | 1 | |a thermal stability | |
| 610 | 1 | |a waterproofness | |
| 610 | 1 | |a люминофоры | |
| 610 | 1 | |a люминесцентные характеристики | |
| 610 | 1 | |a термостойкость | |
| 610 | 1 | |a водонепроницаемость | |
| 701 | 0 | |a Fang Shuangqiang | |
| 701 | 0 | |a Khan (Han) Tao |c specialist in the field of material science |c Senior Researcher of Tomsk Polytechnic University, Ph.D |f 1990- |3 (RuTPU)RU\TPU\pers\46545 |9 22203 | |
| 701 | 0 | |a Lang Tianchun | |
| 701 | 0 | |a Zhong Yang |c specialist in the field of lightning engineering |c Associate Professor of Tomsk Polytechnic University, Ph.D |f 1990- |3 (RuTPU)RU\TPU\pers\39798 |9 21098 | |
| 701 | 0 | |a Bitao Liu | |
| 701 | 0 | |a Cao Shixiu | |
| 701 | 0 | |a Lingling Peng E. | |
| 701 | 1 | |a Yakovlev |b A. N. |c specialist in the field of lightning engineering |c Vice-rector-Director of Tomsk Polytechnic University, Candidate of physical and mathematical sciences |f 1971- |g Aleksey Nikolaevich |3 (RuTPU)RU\TPU\pers\31580 |9 15740 | |
| 701 | 1 | |a Korepanov |b V. I. |c specialist in the field of lightning engineering |c Professor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences |f 1947- |g Vladimir Ivanovich |3 (RuTPU)RU\TPU\pers\33774 |9 17372 | |
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