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 - Článek v odborném periodiku
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
Grant CEP: GA TA ČR TA04010135; GA MŠMT(CZ) LM2011029; GA MŠMT LO1409
Grant ostatní: SAFMAT(XE) CZ.2.16/3.1.00/22132
Institucionální podpora: RVO:68378271
Klíčová slova: luminescence * white light emitting diode * ternary sulfide * EPR
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.728, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0256359