Multicolor upconversion luminescence of rare-earth doped Y2CaZnO5 nanophosphors for white light emitting diodes

R. Rajeswari; S. Surendra Babu; C. K. Jayasankar

doi:10.1117/12.2039237

27 February 2014 Multicolor upconversion luminescence of rare-earth doped Y₂CaZnO₅ nanophosphors for white lighting-emitting diodes

R. Rajeswari, S. Surendra Babu, C. K. Jayasankar

Author Affiliations +

Proceedings Volume 9003, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVIII; 90031N (2014) https://doi.org/10.1117/12.2039237
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

Rare earth doped Y₂CaZnO₅ nanophosphors were synthesized via the citrate-gel combustion method. Transmission electron microscopy measurements reveal that the particles are distributed uniformly within the size range of 10-30 nm. The Er³⁺-doped Y₂CaZnO₅ nanophosphors show strong green upconversion luminescence, which is visible to the naked eye even at 20 mW excitation power of 980 nm diode laser. When these phosphors are codoped with Yb³⁺ ions, the emission changed to reddish color at higher Yb³⁺ ion concentrations. Moreover, these phosphors emitted bright white light luminescence when it is triply doped with Er³⁺/Tm³⁺/Yb³⁺ ions, indicates Y₂CaZnO₅ nanophosphors are an ideal candidate for phosphor converted white light emitting diodes.

Citation Download Citation

R. Rajeswari, S. Surendra Babu, and C. K. Jayasankar "Multicolor upconversion luminescence of rare-earth doped Y₂CaZnO₅ nanophosphors for white lighting-emitting diodes", Proc. SPIE 9003, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVIII, 90031N (27 February 2014); https://doi.org/10.1117/12.2039237

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