The role of Yb3+ concentrations on SrLaMgTaO6:Er3+double perovskite phosphor

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Important Dates

Conference:

Apr. 22-24, 2019

Full Paper Due: Mar. 18, 2019

Abstract Due: Mar. 18, 2019

Audience Registration Due:
Apr. 22, 2019

Presentations of The Spring World Congress on Engineering and Technology (SCET 2017)

● The role of Yb3+ concentrations on SrLaMgTaO6:Er3+double perovskite phosphor
Author(s)
Dorim Kim
Affiliation(s)
Department of Physics, Pukyong National University, Busan 48513, South Korea
KEYWORDS
Yb3+ concentrations, SrLaMgTaO6:Er3+double perovskite phosphor
ABSTRACT
The Er3+, Yb3+ co-doped SrLaMgTaO6 phosphors have been successfully synthesized by solid state reaction method and their optical properties withupconversion mechanisms were investigated in detail. Under 975 nm excitation, the SrLaMgTaO6:Er3+/Yb3+ phosphors have been emitted strong green luminescence centered at 525 nm and 545 nm and relatively weak red anti-stokes luminescence centered at 660 nm. The sensitized energy upconversion [s-ETU2: Yb3+ (2F5/2) +Er3+ (4I11/2) → Yb3+ (2F7/2) +Er3+ (4F7/2)] is a main route of green upconversion photoluminescence (UCPL), and the energy back transfer [EBT: Er3+ (4S3/2) + Yb3+ (2F7/2) → Er3+ (4I13/2) + Yb3+ (2F5/2)] is a main route of red UCPL which reduces the green UCPL to a certain degree. And the reduced green and red UCPL of the sample with high concentration of Yb3+ is chiefly attributed to the concentration quenching of Yb3+.