Concentration-dependent structural modification and color tunability of Sm3+-doped ZnAl2O4 phosphors
Source abstract
Abstract
This research deals with the synthesis of undoped and Sm3+-doped ZnAl2O4 using the citrate sol–gel method. Various complementary techniques have extensively studied the consequences of samarium ion (Sm3+) doping on the crystallinity and emission mechanism. XRD analysis endorses the formation of Sm3+-doped ZnAl2O4 spinel powder within the size range of 14–26 nm. The granular surface morphology of the prepared samples and their particle size distribution were examined by SEM and TEM, respectively. The direct bandgap of the doped samples was calculated (2.77–3.65 eV) using the Kubelka–Munk function on the diffuse reflectance data. At high concentrations of Sm3+, photoluminescence (PL) results demonstrate orange-red emission at 597 nm after providing energy corresponding to direct excitation (396 nm) of Sm3+ ion. The blue-green emission is obtained first time in Sm3+-doped ZnAl2O4 at λex = 320 nm excitation wavelength. The CIE chromaticity coordinates indicated that the prepared samples could be applied as an efficient phosphor in the visible range.
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Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Advanced Photocatalysis Techniques · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (42)
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