Green-emitting Er³⁺-doped La₃GaO₆ phosphors: gel-combustion synthesis, rietveld refinement and photoluminescence properties for solid-state lighting applications.
- 1Department of Chemistry, Maharshi Dayanand University Rohtak 124001 India [email protected].
- 2Government College for Women Gurawara Rewari 123035 Haryana India.
- 3Department of Chemistry, School of Chemical Sciences, Central University of Haryana Mahendragarh 123031 India.
Abstract
Er³⁺-doped La₃GaO₆ (LGO) nanophosphors were prepared via a gel-combustion route and their structural as well as optical properties were studied in detail. Rietveld-refined XRD analysis confirmed the orthorhombic crystal structure of the prepared nanophosphor with a Cmc2₁ space group. The synthesized phosphors were characterized by Field Emission Scanning Electron Microscopy (FE-SEM) and Energy Dispersive X-ray Spectroscopy (EDX) to evaluate their morphology and elemental composition. A prominent excitation peak centered at 379 nm was observed in the photoluminescence (PL) excitation spectrum accredited to ⁴I15/2 → ⁴G11/2 transition. On excitation at this wavelength, the phosphor exhibited a strong green emission peak at 549 nm arising from radiative transition (⁴S3/2 → ⁴I15/2) of Er³⁺ ions. The emission intensity reached a maximum value at 4 mol% Er³⁺ concentration, beyond which it progressively decreases due to concentration quenching (CQ). The critical distance of 18.2451 Å and interaction parameter (Q ≈ 8) suggested that dipole-quadrupole interactions are responsible for non-radiative energy transfer process. The CIE chromaticity coordinates (0.3186, 0.6418), color purity (85.07%) and correlated color temperature (5718.44 K) show that the 4 mol% of Er³⁺ doped LGO phosphor has good optical performance for future applications in solid state lighting systems.
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BibTeX
@article{dahiya2026greenemitting,
title = {{Green-emitting Er³⁺-doped La₃GaO₆ phosphors: gel-combustion synthesis, rietveld refinement and photoluminescence properties for solid-state lighting applications.}},
author = {Bharti Dahiya and Devender Singh and Rinki Jangra and Reshu Kajal and Ekta Poonia and Sitender Singh and Ajay Kumar and Harish Kumar},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra05656c},
url = {https://europepmc.org/article/MED/42948554},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Green-emitting Er³⁺-doped La₃GaO₆ phosphors: gel-combustion synthesis, rietveld refinement and photoluminescence properties for solid-state lighting applications.
AU - Bharti Dahiya
AU - Devender Singh
AU - Rinki Jangra
AU - Reshu Kajal
AU - Ekta Poonia
AU - Sitender Singh
AU - Ajay Kumar
AU - Harish Kumar
PY - 2026
DA - 2026/10/27
JO - RSC advances
DO - 10.1039/d6ra05656c
UR - https://europepmc.org/article/MED/42948554
AB - Er³⁺-doped La₃GaO₆ (LGO) nanophosphors were prepared via a gel-combustion route and their structural as well as optical properties were studied in detail. Rietveld-refined XRD analysis confirmed the orthorhombic crystal structure of the prepared nanophosphor with a Cmc2₁ space group. The synthesized phosphors were characterized by Field Emission Scanning Electron Microscopy (FE-SEM) and Energy Dispersive X-ray Spectroscopy (EDX) to evaluate their morphology and elemental composition. A prominent excitation peak centered at 379 nm was observed in the photoluminescence (PL) excitation spectrum accredited to ⁴I15/2 → ⁴G11/2 transition. On excitation at this wavelength, the phosphor exhibited a strong green emission peak at 549 nm arising from radiative transition (⁴S3/2 → ⁴I15/2) of Er³⁺ ions. The emission intensity reached a maximum value at 4 mol% Er³⁺ concentration, beyond which it progressively decreases due to concentration quenching (CQ). The critical distance of 18.2451 Å and interaction parameter (Q ≈ 8) suggested that dipole-quadrupole interactions are responsible for non-radiative energy transfer process. The CIE chromaticity coordinates (0.3186, 0.6418), color purity (85.07%) and correlated color temperature (5718.44 K) show that the 4 mol% of Er³⁺ doped LGO phosphor has good optical performance for future applications in solid state lighting systems.
SN - 2046-2069
ER -