Improved phase stability of the metastable K2GeF6:Mn4+ phosphors with high thermal stability and water-proof property by cation substitution / Lang Tianchun, Khan Tao, Fang Shuangqiang [et al.]

Уровень набора: Chemical Engineering JournalАльтернативный автор-лицо: Lang Tianchun;Khan Tao;Fang Shuangqiang;Wang Qunyi;Cao Shixiu;Peng Lingling;Liu Bitao;Korepanov, V. I., specialist in the field of lightning engineering, Professor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences, 1947-, Vladimir Ivanovich;Yakovlev, A. N., specialist in the field of lightning engineering, Vice-rector-Director of Tomsk Polytechnic University, Candidate of physical and mathematical sciences, 1971-, Aleksey NikolaevichКоллективный автор (вторичный): Национальный исследовательский Томский политехнический университет, Инженерная школа новых производственных технологий, Отделение материаловеденияЯзык: английский.Резюме или реферат: K2GeF6:Mn4+ (KGFM) phosphors with very poor water-proof property in HF solution transform automatically from P63mc hexagonal phase to P3¯m1 trigonal phase. By substituting Ge4+ ion with Si4+ ion, the metastable P63mc hexagonal K2(Ge1-xSix)F6:Mn4+ (KGSFM) with an obvious zero-phonon line peaking at 623.8 nm is stabilized in HF solution. When x = 0.3, the photoluminescence intensity of KGSFM keeps 78% after 168 h in water as well as it increases by 14% at 150 °C (423 K) more than that of KGFM. By using KGSFM the fabricated WLEDs exhibit the high color-rendering index (Ra=92) and low correlated color temperature (CCT=3810 K). These results demonstrate that KGSFM solid solution with efficient red emission, meritorious water-proof and high thermal stability is a promising phosphor for the commercial application in the WLEDs and wide-gamut displays..Примечания о наличии в документе библиографии/указателя: [References: 27 tit.].Аудитория: .Тематика: электронный ресурс | труды учёных ТПУ | K2GeF6:Mn4+ | metastable phase | red phosphor | high thermal stability | water-proof | метастабильные фазы | люминофоры | термостойкость | водонепроницаемость Ресурсы он-лайн:Щелкните здесь для доступа в онлайн
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[References: 27 tit.]

K2GeF6:Mn4+ (KGFM) phosphors with very poor water-proof property in HF solution transform automatically from P63mc hexagonal phase to P3¯m1 trigonal phase. By substituting Ge4+ ion with Si4+ ion, the metastable P63mc hexagonal K2(Ge1-xSix)F6:Mn4+ (KGSFM) with an obvious zero-phonon line peaking at 623.8 nm is stabilized in HF solution. When x = 0.3, the photoluminescence intensity of KGSFM keeps 78% after 168 h in water as well as it increases by 14% at 150 °C (423 K) more than that of KGFM. By using KGSFM the fabricated WLEDs exhibit the high color-rendering index (Ra=92) and low correlated color temperature (CCT=3810 K). These results demonstrate that KGSFM solid solution with efficient red emission, meritorious water-proof and high thermal stability is a promising phosphor for the commercial application in the WLEDs and wide-gamut displays.

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