Abstract

In this present work, no reports are available on the chromaticity characteristics of microwave-synthesized YMnO3nanostructures for potential LED application. YMnO3material was synthesized under different microwave power irradiations (420, 560, and 700 W), followed by calcination at 1100 °C for 2h. Additionally, a 2 wt% yttrium nitrate-assisted YMnO3sample was prepared under 420 W irradiation. The synthesized YMnO3compounds were extensively characterized to evaluate their structural, morphological, optical, luminescent, and chromaticity features. XRD analysis confirmed the formation of a hexagonal crystal structure. Three characteristic peaks at ?424, ?566, and ?680 cm?1in the FTIR spectra correspond to Y-O and Mn-O vibrations, further validating the formation of YMnO3. At low magnification, the nanoscale morphology of the 420 W sample exhibited rice-like structures, while high magnification revealed agglomerated spherical particles. SEM images of the YMnO3at 560 and 700 W showed a non-uniform distribution of spherical particles and elongated spherical morphologies at magnifications of 1 ?m, 300, and 200 nm. The 2 % yttrium-nitrate-assisted YMnO3(420 W) exhibited porous structures with numerous smaller spherical particles, as observed at both lower and higher magnifications (1 ?m, 300 nm, and 200 nm). The particle size of YMnO3was tuned under different microwave power irradiations (420, 560, and 700 W), as confirmed by SEM analysis. EDX analysis confirmed the presence of Y, Mn, and O elements in the synthesized samples. UV–visible spectra of synthesized YMnO3revealed strong absorption in both the UV and visible regions, with a narrow optical bandgap of 1.37–2 eV. PL spectra showed UV and visible emission peaks, attributed to electronic transitions and oxygen vacancy defects. The chromaticity coordinates of the 420 W sample corresponded to blue-cyan emission, while the YMnO3samples synthesized at 560 W, 700 W, and the 2 wt% yttrium nitrate-assisted YMnO3(420 W) exhibited emissions in the yellow region. © 2025 Elsevier Ltd and Techna Group S.r.l. All rights are reserved, including those for text and data mining, AI training, and similar technologies.