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Spectral‐converting study of Ba 9–3( m + n )/2 Er m Yb n Y 2 Si 6 O 24 ( m = 0.005 – 0.2, n = 0 – 0.3) orthosilicate phosphors
Author(s) -
Choi SeulKi,
Park Sangmoon
Publication year - 2016
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2986
Subject(s) - phosphor , photoluminescence , analytical chemistry (journal) , ion , green light , materials science , emission spectrum , doping , excitation , luminescence , emission intensity , diode , chemistry , spectral line , optoelectronics , blue light , physics , organic chemistry , chromatography , quantum mechanics , astronomy
Optical materials composed of Ba 9–3( m + n )/2 Er m Yb n Y 2 Si 6 O 24 ( m = 0.005–0.2, n = 0–0.3) were prepared using a solid‐state reaction. The X‐ray diffraction patterns of the obtained phosphors were examined to index the peak positions. The photoluminescence (PL) excitation and emission spectra of the Er 3+ ‐activated phosphors and the critical emission quenching as a function of Er 3+ content in the Ba 9–3 m /2 Er m Y 2 Si 6 O 24 structure were monitored. The spectral conversion properties of Er 3+ and Er 3+ –Yb 3+ ions doped in Ba 9 Y 2 Si 6 O 24 phosphors were elucidated under diode‐laser irradiation at 980 nm. Up‐conversion emission spectra and the dependence of the emission intensity on pump power for the Ba 8.55 Er 0.1 Yb 0.2 Y 2 Si 6 O 24 phosphor were investigated. The desired up‐conversion of the emitted light, which passed through the green, yellow, orange and red regions of the spectrum, was achieved through the use of appropriate Er 3+ and/or Yb 3+ concentrations in the host structure and 980 nm excitation light. The up‐conversion mechanism in the phosphors is described by an energy‐level schematic. Copyright © 2015 John Wiley & Sons, Ltd.