Synthesis, structure, and photoluminescence analysis of thermally stable Sm³⁺ doped YPO₄ phosphor

Abstract

In this manuscript, we used the coprecipitation method to manufacture Sm3+ doped YPO4. To verify the phase and structural properties of the synthesized material, we performed XRD. The diffraction patterns of the synthesized sample match the tetragonal YPO4 with no indication of an impurity peak, demonstrating the creation of a pure phase. The photoluminescence excitation and emission profiles of the synthesized material were recorded. Characteristic excitation and emission peaks of Sm3+ were observed. The distinctive orange-reddish emission of Sm3+ is found at the highest intense excitation peak (404 nm). The CIE spectral coordinates of the phosphor are (0.6080,0.3912). The emission spectra are recorded under various excitation levels. The temperature-dependent emission under 404 nm excitation is also observed to confirm the thermal stability of the synthesized material. The emission intensity drops just 13% up to 150 °C, indicating the material’s remarkable thermal stability. These findings indicate that the synthesized material is suitable for application in display devices.

Green Emission in Thermally Stable Er3+ Doped Lead-Free Perovskite Phosphor for Solid-State Lighting and Optical Thermometry Applications

“…Achieving these characteristics is paramount to ensuring optimal visual comfort, color fidelity, and overall lighting performance in diverse applications ranging from commercial and residential settings to industrial environments. Consequently, researchers adopted an alternative strategy to enhance the quality of WLEDs by encapsulating a Near-Ultraviolet (NUV) blue chip with a composite of red, green, and blue phosphors [15,16]. The identification of green, red, and blue phosphors responsive to NUV light becomes paramount in this context.…”