Selectivity of Mn2+ ion occupancy and energy transfer of Ce3+ -> Mn2+ ions in garnet solid solution; Journal of Materials Chemistry C; Vol. 8, iss. 41

Selectivity of Mn2+ ion occupancy and energy transfer of Ce3+ -> Mn2+ ions in garnet solid solution; Journal of Materials Chemistry C; Vol. 8, iss. 41

Bibliographic Details
Parent link:Journal of Materials Chemistry C
Vol. 8, iss. 41.— 2020.— [P. 14507-14514]
Corporate Author: Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения
Other Authors: Cai Mingsheng, Fang Shuangqiang, Khan Tao, Valiev D. T. Damir Talgatovich, Lang Tianchun, Zhong Yang, Wang Cailun, Yakovlev A. N. Aleksey Nikolaevich, Polisadova E. F. Elena Fyodorovna
Summary:Title screen
As a luminous center, Mn2+ has the advantages of high efficiency, safety, and low cost, and has been widely used to improve the color rendering index of garnet structured phosphors. Although the position of Mn2+ in garnet structures and its corresponding spectrum have been widely discussed, there is no convincing conclusion. In this paper, the selectivity of Mn2+ ion occupancy in the Y3Al5O12:0.1Ce3+,yMn2+(y = 0-0.22) garnet structure and their corresponding emission spectra were determined. At low substitution density, Mn2+ ions (y=0-0.007) easily replace Al3+ ions in the octahedron and emit 590 nm red light under 450 nm blue light excitation, which were determined by calculating the formation energy of the (Mn/Al) and (Mn/Y) local coordination and powder XRD analysis. Upon increasing the Mn2+ concentration from 0.007 to 0.22, the emission light with a peak at 750 nm gradually appears. Meanwhile, the effect of Y3+ ions on the energy transfer of Ce3+ - Mn2+ in (Lu1xYx)3Al4.8Si0.2O12:0.1Ce3+,0.2Mn2+ (x=0-1) is achieved through the reduction of the distance between Ce3+ and Mn2+ ions in the dodecahedron. The above work provides support for the correct understanding of the luminescence behavior of Mn2+, and the influence of the microstructure on the energy transfer of Ce3+ - Mn2+ ions. Finally, high color rendering index (83.4) wLEDs were fabricated by the Lu1.2Y1.8Al4.8Si0.2O12:0.1Ce3+,0.2Mn2+ phosphor and the blue chip under 120 mA.
Режим доступа: по договору с организацией-держателем ресурса
Language:English
Published: 2020
Subjects:
электронный ресурс
труды учёных ТПУ
селективность
ионы
передача энергии
твердые растворы
гранат
люминофоры
люминесценция
цветопередача
Online Access:https://doi.org/10.1039/D0TC03960H
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=665221

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