TY - JOUR
T1 - Tunable white emission of silver-sulfur-zeolites as single-phase LED phosphors
AU - Baekelant, Wouter
AU - Romolini, Giacomo
AU - Sun, Li
AU - De Ras, Michiel
AU - Fron, Eduard
AU - Moreira, Tiago
AU - Viola, Catarina
AU - Ruivo, Andreia
AU - Laia, César A. T.
AU - Martens, Johan
AU - Martin, Cristina
AU - Kim, Cheol Woong
AU - Van Der Auweraer, Mark
AU - Roeffaers, Maarten B. J.
AU - Hofkens, Johan
AU - Coutino-Gonzalez, Eduardo
N1 - The authors would like to thank the Associate Laboratory for Green Chemistry- LAQV and the research unit Glass and Ceramic for the Arts - Vicarte, which are financed by national funds from FCT/MCTES (UID/QUI/50006/2019 and UID/EAT/00729/2019).
The authors acknowledge financial support from the Research Foundation-Flanders (FWO, Grant No. G098319N, No 12J1716N), the KU Leuven Research Fund (C14/15/053), the Flemish government through long term structural funding Methusalem (CASAS2, Meth/15/04) the Hercules foundation (HER/11/14) and the Portuguese FCT-MCTES (PTDC/QEQ-QIN/3007/2014).
E.C.G. gratefully acknowledges the support provided by Ctedras-CONACYT.
PY - 2020
Y1 - 2020
N2 - Metal clusters confined inside zeolite materials display remarkable luminescent properties, making them very suitable as potential alternative phosphors in white LED applications. However, up to date, only single-color emitters have been reported for luminescent metal-exchanged zeolites. In this study, we synthesized and characterized white emitting silver-sulfur zeolites, which show a remarkable color tunability upon the incorporation of silver species in highly luminescent sulfur-zeolites. Via a combined steady-state and time-resolved photoluminescence spectroscopy characterization, we suggest that the observed luminescence and tunability arise from the presence of two different species. The first associated to an orange-red emitting silver cluster (Ag-CL), whereas the second is related to a blue-white emitting S-Ag-species. The relative contribution of both luminescent species depends on the synthesis procedure. It was shown that the formation of the blue-white emitting S-Ag-species is favored upon a heat-treatment of the samples.
AB - Metal clusters confined inside zeolite materials display remarkable luminescent properties, making them very suitable as potential alternative phosphors in white LED applications. However, up to date, only single-color emitters have been reported for luminescent metal-exchanged zeolites. In this study, we synthesized and characterized white emitting silver-sulfur zeolites, which show a remarkable color tunability upon the incorporation of silver species in highly luminescent sulfur-zeolites. Via a combined steady-state and time-resolved photoluminescence spectroscopy characterization, we suggest that the observed luminescence and tunability arise from the presence of two different species. The first associated to an orange-red emitting silver cluster (Ag-CL), whereas the second is related to a blue-white emitting S-Ag-species. The relative contribution of both luminescent species depends on the synthesis procedure. It was shown that the formation of the blue-white emitting S-Ag-species is favored upon a heat-treatment of the samples.
KW - LED
KW - metal cluster
KW - self-assembly
KW - white-emitting phosphors
KW - zeolites
UR - http://www.scopus.com/inward/record.url?scp=85080847060&partnerID=8YFLogxK
U2 - 10.1088/2050-6120/ab7169
DO - 10.1088/2050-6120/ab7169
M3 - Article
C2 - 31995792
AN - SCOPUS:85080847060
SN - 2050-6120
VL - 8
JO - Methods and Applications in Fluorescence
JF - Methods and Applications in Fluorescence
IS - 2
M1 - 024004
ER -