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- W2897557264 abstract "Currently, hunting for anti-temperature-degradation high-efficiency phosphors has become crucially significant for fabricating high-brightness phosphor-converted white light-emitting diodes (pc-WLEDs). Herein, we show that photoluminescence in a kind of full-solution-processed K2SiF6:Mn4+ red phosphor exhibits an extraordinarily large negative thermal quenching property. For instance, under the excitation of 477 nm laser light, the sample photoluminescence intensity amazingly increases by 347-fold when the temperature is increased from 4 to 477 K. The temperature-driven transition probability enhancement of the phonon-induced luminescence around Mn4+ ions in the phosphor is argued to be responsible for the large negative-thermal-quenching phenomenon. We also demonstrate a pc-WLED with Ra of 82 and correlated color temperature of 2701 K by using the K2SiF6:Mn4+ red phosphor + commercial yellow phosphor of YAG:Ce3+." @default.
- W2897557264 created "2018-10-26" @default.
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- W2897557264 date "2018-10-19" @default.
- W2897557264 modified "2023-10-02" @default.
- W2897557264 title "Large Negative-Thermal-Quenching Effect in Phonon-Induced Light Emissions in Mn<sup>4+</sup>-Activated Fluoride Phosphor for Warm-White Light-Emitting Diodes" @default.
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- W2897557264 doi "https://doi.org/10.1021/acsomega.8b01127" @default.
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