Red shift properties, crystal field theory and nephelauxetic effect on Mn4+-doped SrMgAl10-yGayO17 red phosphor for plant growth LED light : научное издание

Описание

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1016/j.cej.2020.125208

Ключевые слова: Crystal field theory, Nephelauxetic effect, Plant growth LED light, Red shift, SrMgAl10-yGayO17: Mn4+

Аннотация: The discovery of novel Mn4+-doped oxide red phosphor with suitable spectrum for plant growth is a hot issue in the recent years due to the characteristic red photoluminescence of 2Eg → 4A2 transition in Mn4+ ions. Generally, the emission position of Mn4+ is hard to tune because of specific crystal field in most phosphors. In this wПоказать полностьюork, tunable luminescence property with obvious red shift in the spectra is observed in the Mn4+-doped SrMgAl10-yGayO17 red phosphor via simple substitution of Ga3+ for Al3+, and crystal field theory and nephelauxetic effect are employed to explain this phenomenon. Meanwhile, the Ga3+ dopant changes the shape of the spectra because Ga3+ dopant guides the replacement site of Mn4+ and changes the luminescence center. Improved emission intensity is obtained because appropriate Ga3+ doping leads to larger band gap and reduces non-radiative transitions. Phosphor-converted LED (pc-LED) devices fabricated with blue chip (470 nm) and the as-obtained SrMgAl10-yGayO17:1.0%Mn4+ phosphors emit bright blue and red light, which fit the absorption regions of plant pigments well, thus SrMgAl10-yGayO17:Mn4+ phosphor can be a candidate for plant growth LED light. © 2020 Elsevier B.V.

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Издание

Журнал: Chemical Engineering Journal

Выпуск журнала: Vol. 396

Номера страниц: 125208

ISSN журнала: 13858947

Издатель: Elsevier B.V.

Персоны

  • Gu Simin (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Hunan, Peoples R China; Hunan Opt Agr Engn Technol Res Ctr, Changsha 410128, Hunan, Peoples R China)
  • Xia Mao (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Hunan, Peoples R China; Hunan Opt Agr Engn Technol Res Ctr, Changsha 410128, Hunan, Peoples R China)
  • Zhou Cheng (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Hunan, Peoples R China)
  • Kong Zihui (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Hunan, Peoples R China)
  • Molokeev Maxim S. (RAS, SB, Fed Res Ctr, Lab Crystal Phys,Kirensky Inst Phys,KSC, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Liu Li (Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Key Lab Synth & Applicat Organ Funct Mol, Minist Educ,Sch Chem & Chem Engn, Wuhan 430062, Hubei, Peoples R China)
  • Wong Wai-Yeung (Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Hung Hom, Hong Kong, Peoples R China)
  • Zhou Zhi (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Hunan, Peoples R China; Hunan Opt Agr Engn Technol Res Ctr, Changsha 410128, Hunan, Peoples R China)

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