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Near-infrared downshifting luminescence of Ca2LaTaO6:Nd3+/Yb3+/K+ phosphors and their applications: solar cells and anti-counterfeiting
Dalton Transactions ( IF 3.5 ) Pub Date : 2024-12-10 , DOI: 10.1039/d4dt02748e
Hang Liu, Haozhou Tian, Chunhui Sun, Qiang Wang, Hongqun Zhu, Xuezhong Yang, Haoran Wang, Yuhong Zhang

A series of Nd3+/Yb3+ co-doped Ca2LaTaO6 (CLTO) phosphors are synthesized by a high temperature solid phase method. Structural characterization confirms the successful incorporation of Nd3+ and Yb3+ ions into the CLTO host lattice. The photoluminescence excitation (PLE) spectra and photoluminescence (PL) spectra of CLTO:Nd3+ and CLTO:Nd3+/Yb3+ are investigated in detail. Under the excitation of ultraviolet (UV) and visible (VIS) light, the CLTO:Nd3+/Yb3+ phosphor emits broadband near infrared (NIR) luminescence. In particular, the luminescence intensity of the Yb3+ ion is increased through an energy transfer (ET) process from Nd3+ to Yb3+. The luminescence mechanism of the CLTO:Nd3+/Yb3+ sample is analyzed based on the decay lifetime and PL spectra. In addition, the NIR emission intensity of Yb3+ ions is also enhanced by doping K+ ions. The broadband luminescence (850–1050 nm) of the CLTO:Nd3+/Yb3+/K+ phosphor has good application in solar cells and anti-counterfeiting.

中文翻译:


Ca2LaTaO6:Nd3+/Yb3+/K+荧光粉的近红外下移发光及其应用:太阳能电池和防伪



通过高温固相法合成了一系列 Nd3+/Yb3+ 共掺杂的 Ca2LaTaO6 (CLTO) 荧光粉。结构表征证实了 Nd3+ 和 Yb3+ 离子成功掺入 CLTO 主晶格中。详细研究了 CLTO:Nd3+ 和 CLTO:Nd3+/Yb3+ 的光致发光激发 (PLE) 光谱和光致发光 (PL) 光谱。在紫外光 (UV) 和可见光 (VIS) 的激发下,CLTO:Nd3+/Yb3+ 荧光粉发出宽带近红外 (NIR) 发光。特别是,Yb3+ 离子的发光强度通过能量转移 (ET) 过程从 Nd3+ 增加到 Yb3+。根据衰变寿命和 PL 光谱分析 CLTO:Nd3+/Yb3+ 样品的发光机理。此外,掺杂 K+ 离子也增强了 Yb3+ 离子的 NIR 发射强度。CLTO:Nd3+/Yb3+/K+ 荧光粉的宽带发光 (850–1050 nm) 在太阳能电池和防伪方面具有良好的应用。
更新日期:2024-12-10
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