Optical, structural and paramagnetic properties of Eu-doped ternary sulfides ALnS.sub.2./sub. (A = Na, K, Rb; Ln = La, Gd, Lu, Y)

0455740 - FZÚ 2016 RIV CH eng J - Journal Article
Jarý, Vítězslav - Havlák, Lubomír - Bárta, J. - Buryi, Maksym - Mihóková, Eva - Rejman, M. - Laguta, Valentyn - Nikl, Martin
Optical, structural and paramagnetic properties of Eu-doped ternary sulfides ALnS₂ (A = Na, K, Rb; Ln = La, Gd, Lu, Y).
Materials. Roč. 8, č. 10 (2015), s. 6978-6998. E-ISSN 1996-1944
R&D Projects: GA TA ČR TA04010135; GA MŠMT(CZ) LM2011029; GA MŠMT LO1409
Grant - others:SAFMAT(XE) CZ.2.16/3.1.00/22132
Institutional support: RVO:68378271
Keywords : luminescence * white light emitting diode * ternary sulfide * EPR
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.728, year: 2015

Eu-doped ternary sulfides of general formula ALnS2 (A = Na, K, Rb; Ln = La, Gd, Lu, Y) are presented as a novel interesting material family which may find usage as X-ray phosphors or solid state white light emitting diode (LED) lighting. Samples were synthesized in the form of transparent crystalline hexagonal platelets by chemical reaction under the flow of hydrogen sulfide. Their physical properties were investigated by means of X-ray diffraction, time-resolved photoluminescence spectroscopy, electron paramagnetic resonance, and X-ray excited fluorescence. Corresponding characteristics, including absorption, radioluminescence, photoluminescence excitation and emission spectra, and decay kinetics curves, were measured and evaluated in a broad temperature range (8–800 K). The application potential of the mentioned compounds in the field of white LED solid state lighting or X-ray phosphors is thoroughly discussed.
Permanent Link: http://hdl.handle.net/11104/0256359