RT Journal Article
T1 Structural and luminescent properties of a Cr3+/Sm3+ doped GdAlO3 orthorhombic perovskite for solid-state lighting applications
A1 Elhamdi, I.
A1 Soussi, Hajer
A1 Kammoun, S.
A1 Dhahri, E.
A1 Pina, J.
A1 Costa, B.F.O.
A1 Brito, A.L.B.
A1 Fausto, R.
A1 López Lago, María Elena
K1 Luminescent properties
K1 Orthorhombic
K1 Solid-state lighting
AB The Cr3+ and Sm3+ doped GdAlO3 perovskite with formula Gd0.995Sm0.005Al0.995Cr0.005O3, was synthesized via a solid-state reaction method, and its structure, morphology, and photoluminescence properties were thoroughly investigated. The compound crystallizes in the orthorhombic Pbnm space group, with Cr3+ transition-metal ions substituting Al3+ in the octahedral symmetry site, and Sm3+ lanthanide (rare-earth) ions occupying the tetrahedral site. The material's morphology and chemical composition homogeneity were evaluated through Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray analysis. Photoluminescence excitation (PLE) and emission spectra (PL) were used to shed light on the electronic structure of the Cr3+ cations, through crystal field analysis in the Oh symmetry site. Theoretical studies enabled the precise assignment of the Cr3+ 3d–3d transitions. The intra-configurational 4f–4f transitions of Sm3+ resulted in a variety of excitation bands appearing in the high-wavelength range of the PLE spectrum. The photoluminescence studies supported the occurrence of energy transfer in the doped GdAlO3 perovskite between Gd3+, Sm3+ and Cr3+ ions. The obtained results suggest the high potential of the synthesized material for solid state lighting applications.
PB Royal Society of Chemistry
YR 2025
FD 2025-01-23
LK https://hdl.handle.net/10347/43040
UL https://hdl.handle.net/10347/43040
LA eng
NO RSC Adv., 2025,15, 2066-2077
NO The CQC-IMS is supported by FCT through projects UI0313B/QUI/2020, UI0313P/QUI/2020 and LA/P/0056/2020 (national funds). This work was also supported by FCT – Fundação para a Ciência e Tecnologia, I. P. through the projects UIDB/04564/2020 and UIDP/04564/2020, with DOI identifiers 10.54499/UIDB/04564/2020 and 10.54499/UIDP/04564/2020, respectively. Access to TAIL-UC facility funded under QREN-Mais Centro Project No. ICT_2009_02_012_1890 is gratefully acknowledged.
DS Minerva
RD 28 abr 2026