期刊论文

Zhou, Nan;Zhou, Zhi

英文

Chemical Engineering Journal

1385-8947

2019

374

381-391

10.1016/j.cej.2019.05.201

The SEM images of CGZO:Mn4+ phosphor at various recording scales were shown in Fig. 1a-d. These particles show irregular shapes and the average diameter was estimated to be about 10 μm. These particles were composed by several agglomerated crystals and the crystal streaks (Fig. 1cd), which are very common in high-temperature solid-state reaction. The crystal structure of CGZO host was shown in Fig. 1e. The crystal framework of CGZO was composed by Ga and Zn polyhedral and Ca atoms locate at

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Mn4+ activated Ca14Ga10Zn6O35 (CGZO)have attracted much attention for the usages of white light-emitting-diodes (WLEDs), solar cells and plant growth LEDs. In this paper, we conducted chemical unit engineering in CGZO:Mn4+ by substituting Ge4+-M+ (M = Li, Na, K)for Ga3+-Ca2+. The impacts of Ge4+-M+ (M = Li, Na, K)substitution on the crystal structure, photoluminescence properties, quantum efficiency (QE)and thermal stability were investigated systematically. With the increase of Ge4+-Li+/Na+ and Ge4+-K+, the diffraction peaks moved towards high...