Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1016/j.ceramint.2020.05.095

Ключевые слова: la2-xyxmgtio6:mn4+, cation substitution, tunable photoluminescence, thermal stability, plant growth led lighting

Аннотация: Currently, phosphor-converted LEDs (pc-LEDs) are revolutionizing the industry of plant growth lighting. To meet the requirements of this technology, phosphors with tunable photoluminescence, high thermal stability and luminous intensity are required. Herein, we found that the simple substitution of yttrium for lanthanum in La2MgTiO6:Mn4+ (LMT:Mn4+) system could satisfy above three criteria simultaneously. The photoluminescence properties can be regulated by continuously controlling the chemical composition of La2-xYxMgTiO6:Mn4+ solid solution. The La sites are occupied by Y ions, causing a significant blue shift in the emission spectra which owing to the change of local crystal field strengthen. Meanwhile, the thermal stability and decay lifetimes are also varied due to the variation of local structure and band gap energy. The thermal stability of the material reaches 83.5% at 150 degrees C, which is better than the reported La2MgTiO6:Mn4+ and Y2MgTiO6:Mn4+ phosphors. The electronic luminescence (EL) of pc-LED devices using La2-xYxMgTiO6:Mn4+ red phosphor is evaluated, which matching the absorption regions of plant pigments well, reflecting the superiority of the studied phosphors in plant growth lighting areas.

Журнал: CERAMICS INTERNATIONAL

Выпуск журнала: Vol. 46, Is. 12

Номера страниц: 20173-20182

ISSN журнала: 02728842

Место издания: OXFORD

Издатель: ELSEVIER SCI LTD

• Gai Shujie (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Peoples R China; Hunan Opt Agr Engn Technol Res Ctr, Changsha 410128, Peoples R China; Hunan Agr Univ, Coll Agron, Changsha 410128, Peoples R China)
• Zhu Haifeng (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Peoples R China; Hunan Opt Agr Engn Technol Res Ctr, Changsha 410128, Peoples R China)
• Gao Peixin (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Peoples R China)
• Zhou Cheng (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Peoples R China)
• Kong Zihui (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Peoples R China)
• Molokeev Maxim S. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
• Qi Zhiyong (Cent South Univ, Sch Architecture & Art, Changsha 410083, Peoples R China)
• Zhou Zhi (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Peoples R China; Hunan Opt Agr Engn Technol Res Ctr, Changsha 410128, Peoples R China)
• Xia Mao (Hunan Agr Univ, Sch Chem & Mat Sci, Changsha 410128, Peoples R China; Hunan Opt Agr Engn Technol Res Ctr, Changsha 410128, Peoples R China)

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