Switchable cool and cold white emission from dysprosium doped SrZnO2

Title
Switchable cool and cold white emission from dysprosium doped SrZnO2
Authors
원성옥ManjuMegha JainPargam VashishthaGovind GuptaAditya SharmaAnkush ViAnup Thakur
Keywords
SrZnO2
Issue Date
2021-01
Publisher
Journal of physics, Condensed matter : an Institute of Physics journal
Citation
VOL 33, NO 3, 035703
Abstract
In presented work, excitation selective novel cool and cold white emission is reported from dysprosium (Dy) doped SrZnO2 nanophosphors, synthesized by combustion technique. The host lattice provided selective excitation routes for Dy3+ levels and intrinsic defects levels via charge transfer (270 nm) and host defects absorption bands (375 nm), respectively. The emission due to Dy3+ levels was found to be exhibiting cool white emission and that from intrinsic defects was cold white emission, as characterized from correlated color temperature. UV irradiated glow curve analysis complemented the results by exhibiting signal due to Dy assisted traps on near UV exposure (254 nm) and that of host related traps at far UV exposure (365 nm). The luminescence phenomenon is comprehended through proposed band model. The obtained results proclaimed SrZnO2:Dy as a potential member among white emitting phosphors to be used as standard daylight sources in commercial and aesthetic lighting.
URI
http://pubs.kist.re.kr/handle/201004/72543
ISSN
0953-8984
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KIST Publication > Article
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