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Investigation on the Effect of Alkali Ions CoDoping on Photoluminescence Properties of Sr3WO6:Ho3+ Phosphor
Abstract
A series of Sr3WO6 phosphors activated with Ho3+ and co-doped with alkali ions were prepared for lighting applications. X-ray diffraction (XRD) patterns confirm the formation of a triclinic crystal structure of the materials. Upon monitoring the emission at 545 nm, all samples exhibit a prominent excitation band centered at 451 nm. Excitation at this wavelength produces an intense green emission at 545 nm, which is attributed to the allowed 5S2/5F4–5I8 transition of Ho3+ ions. With increasing Ho3+ concentration, the photoluminescence (PL) intensity increases up to 3 mol%, after which concentration quenching is observed. To improve luminescence performance, Sr3WO6:Ho3+ was co-doped with alkali metal ions. Incorporation of Li+ significantly enhances the emission intensity, whereas Na+ and K+ co-doping produces only marginal improvement. Later, the Sr3WO6:Ho3+, Li+ is further optimized by varying the Li+ concentration up to 7 mol%. As a result, 5 mol% Li+ co-doping gives the highest PL intensity. To check the photometric analysis, the CIE colour coordinates of all three co-doped samples have been calculated. Overall results suggest that the Sr3WO6:Ho3+, Li+ phosphor holds significant potential to be used in green lighting applications.
About the Authors
K. Jyothi
Department of Physics, Adikavi Nannaya University; Department of Physics, Government Degree College
India
India
Rajamahendravaram, Andhra Pradesh
Pithapuram, Andhra Pradesh
K. Jyothi
Department of Physics, Adikavi Nannaya University; Department of Physics, SVR Government Degree College
India
India
Rajamahendravaram, Andhra Pradesh
Nidadavole, Andhra Pradesh
K. V. R. Murthy
Department of Applied Physics, Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda
India
India
Vadodara
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Review
For citations:
Jyothi K., Jyothi K., Murthy K. Investigation on the Effect of Alkali Ions CoDoping on Photoluminescence Properties of Sr3WO6:Ho3+ Phosphor. Zhurnal Prikladnoii Spektroskopii. 2026;93(5):723.
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