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 La2MgTiOПоказать полностью6: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