发光
替代(逻辑)
阳离子聚合
钙钛矿(结构)
材料科学
光电子学
化学
结晶学
计算机科学
高分子化学
程序设计语言
作者
Bowen Wang,Changshuai Gong,Xuyan Xue,Meiting Li,Qi Zhu,Xuejiao Wang,Ji‐Guang Li
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:52 (45): 16780-16790
被引量:2
摘要
A series of CaGdAlO4-type layered perovskite phosphors showing deep red luminescence (λem = 711 nm, λex = 338 nm) were synthesized via a solid-state reaction. A comprehensive analysis performed via photoluminescence, X-ray photoelectron spectroscopy, thermoluminescence, and fluorescence decay revealed that the deep red luminescence is related to oxygen defects and particularly oxygen interstitials. The defect-related luminescence was effectively regulated through partial substitution of multi-cationic sites (the Ca2+ site with Mg2+, Sr2+, and Ba2+; the Gd3+ site with La3+, Y3+, and Lu3+) and full substitution of Gd3+ with Y3+. Remarkably, a 383.3% stronger luminescence was obtained through partial substitution with Lu3+, and the quantum yield of luminescence reached 28.74%, which is higher than those values of most previously reported self-luminescent systems. A pc-LED device was fabricated using this phosphor, and the device was shown to have potential application in indoor plant cultivation.
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