Synthesis and Luminescence Study of n‐UV Excitable Tm³⁺‐Activated Blue Phosphor

Abstract

Tm3+‐doped La2O3 phosphors with different doping concentration are prepared by co‐precipitation method. The prepared phosphor is characterized by X‐ray powder diffraction (XRD), SEM, Fourier transform infrared (FT‐IR) spectroscopy, and photoluminescence (PL) techniques. The XRD analysis confirms the formation of La2O3. PL measurement shows that the phosphor exhibit characteristic Tm3+ bright blue emission attributed to transition from 1D2 → 3F4 of Tm3+ ions, at 363 nm excitation. The Commission International de I'Eclairage (CIE) chromaticity color coordinates of prepared phosphor is calculated and presented. The excitation peak located at 363 nm matches with the emission wavelength of near UV‐LED chip, this indicates that the prepared phosphor is a promising blue light‐emitting candidate for eco‐friendly solid state lighting (W‐LED) application.

Realizing near white and warm light emission of cuprous iodide complexes by alkyl-isomerization of ligands

“…[18][19][20][21][22][23] However, all the above phosphors are dominated by rare earth element phosphors. [24][25][26][27][28][29][30][31][32][33] Due to the potential cost and supply risks of rare earth elements, and their negative impact on the environment and human health, it is critical to develop some low-cost, high-performance, and rare earth element-free phosphors. [34][35][36][37][38][39] Copper halide-based inorganic-organic hybrid materials have been studied for many years due to their abundant reserves, low toxicity, structural diversity, and unique photophysical properties.…”