Zero-thermal-quenching of Mn4+ far-red-emitting in LaAlO3 perovskite phosphor via energy compensation of electrons’ traps; Chemical Engineering Journal; Vol. 389

Zero-thermal-quenching of Mn4+ far-red-emitting in LaAlO3 perovskite phosphor via energy compensation of electrons’ traps; Chemical Engineering Journal; Vol. 389

Détails bibliographiques
Parent link:Chemical Engineering Journal
Vol. 389.— 2020.— [124297, 12 p.]
Collectivité auteur: Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения
Autres auteurs: Fang Shuangqiang, Lang Tianchun, Khan Tao, Wang Qunyi, Yan Tszyayao, Cao Shixiu, Peng Lingling, Liu Bitao, Yakovlev A. N. Aleksey Nikolaevich, Korepanov V. I. Vladimir Ivanovich
Résumé:Title screen
Nowadays, Mn4+-doped oxide phosphors have attracted more and more attentions owing to their widespread applications in white LEDs, optical data storage and agricultural production, but these phosphors have two most significant problems including thermal quenching (TQ) and low quantum efficiency. Here, we report a far-red-emitting LaAlO3:3%Ca2+,1%Bi3+,0.1%Mn4+ perovskite phosphor which exhibits zero-TQ even up to 150 °C and high internal quantum efficiency (IQE) of 89.3%. To our best knowledge, the zero-TQ phenomenon is first realized in Mn4+-activated perovskite phosphors caused by the synergistic action of Ca2+ and Bi3+ which is attributed to the efficient energy transfer, energy compensation and structural rigidity enhancement. Moreover, the gratifying luminous performance improvement is obtained due to charge compensation effect, optimized crystal field and excited electrons transfer. The main emission peak of this phosphor is monitored at ~730 nm which perfectly matches the absorption spectrum of phytochrome PFR which has a good application prospect for improving plant seed germination, flowering, fruiting and aging. These findings may provide a feasible way to simultaneously improve thermal stability and quantum efficiency of Mn4+ luminescence in oxide hosts.
Режим доступа: по договору с организацией-держателем ресурса
Langue:anglais
Publié: 2020
Sujets:
электронный ресурс
труды учёных ТПУ
zero-thermal-quenching
high quantum efficiency
Ca2+
Bi3+ and Mn4+ co-doped
LaAlO3 phosphor
spectrum resemblance to phytochrome
охлаждение
квантовая эффективность
люминофоры
Accès en ligne:https://doi.org/10.1016/j.cej.2020.124297
Format: Électronique Chapitre de livre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=665099

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