Interstitial tuning of Y3+ sites with Li+ sensitized improved Tb3+emission for WLED application

Next Nanotechnology Pub Date : 2024-01-01 DOI:10.1016/j.nxnano.2024.100079

Davidson Pyngrope, Phlegon Syndai, Amresh I Prasad

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Abstract

A series of wide-ranging single phase YPO₄:xTb³⁺ phosphor was prepared by wet chemical route. In order to maximise the use of YPO₄:Tb³⁺ nanoparticles in WLED, this work used Li⁺ sensitization to interstitially modify the particles' photoluminescence intensity. The prepared nanoparticles are characterized using X-Ray diffraction, FT-IR, TEM and Photoluminescence. The annealing effect on the particle size, morphology and its luminescence intensities are studied. This increased crystallinity led to a rise in the photoluminescence intensity of the nanoparticles. YPO₄:Tb³⁺ nanoparticles' excitation and emission spectra were shown by photoluminescence investigations. Optical absorption and emission spectra confirmed all peaks associated to various transitions of the Tb³⁺ ions. Because of the increased crystallinity and decreased water content, the emission intensity rose with the annealing temperature. Li⁺ co-doping increased the emission intensity even more; where the emission intensity showed seven times. The results emphasise the significance of Li⁺ sensitization and annealing temperature in adjusting the luminous properties for possible uses in WLED and other display systems

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利用 Li+敏化改进 Tb3+发射的 Y3+位点间隙调谐技术，实现 WLED 应用

通过湿化学方法制备了一系列范围广泛的单相 YPO4:xTb3+ 荧光粉。为了最大限度地将 YPO4:Tb3+ 纳米粒子应用于 WLED，本研究利用 Li+ 敏化技术对粒子的光致发光强度进行了间隙修饰。利用 X 射线衍射、傅立叶变换红外光谱、TEM 和光致发光对制备的纳米粒子进行了表征。研究了退火对颗粒大小、形态及其发光强度的影响。结晶度的增加导致纳米粒子的光致发光强度上升。光致发光研究显示了 YPO4:Tb3+ 纳米粒子的激发光谱和发射光谱。光吸收和发射光谱证实了与 Tb3+ 离子的各种跃迁相关的所有峰值。由于结晶度的增加和含水量的降低，发射强度随退火温度的升高而升高。Li+ 共掺杂使发射强度增加得更多；发射强度增加了七倍。这些结果表明，Li+敏化和退火温度在调整发光特性方面具有重要意义，可用于 WLED 和其他显示系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Next Nanotechnology

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