White-light emission from Y2SiO5:Ce3+, Tb3+ and Sr2Si5N8:Eu2+ phosphor blends: a predictive model
Por:
Flores, Dora-Luz, Gutierrez, Everardo, Cervantes, David, Chacon, Marco, Hirata, Gustavo
Publicada:
1 jul 2017
Resumen:
In recent years, there has been an increasing interest in developing
multifunctional materials that can be used in different areas, such as
artificial lighting. White light-emitting diodes offer the possibility
of efficient, safe, and reliable solid-state lighting. This study
presents a synthesis and characterisation process of a white-light
emitting phosphor based on the combination of rare earth-activated
Y2SiO5:Ce3+, Tb3+ (YSO) and Sr2Si5N8:Eu2+ (SSN) phosphors. The YSO
phosphor was prepared by combustion synthesis, whereas the SSN phosphor
was prepared by solid-state reaction under N-2/H-2 atmosphere.
Photoluminescence measurements showed the contribution of a broad-band
emission of Ce3+ ions located in the blue region of the electromagnetic
spectrum, a well-defined green emission of Tb3+ ions with the main peak
located at (Em) = 545 nm in the YSO phosphor, and a broad-band emission
in the red region due to Eu2+ ions in the SSN phosphor. It is worth
mentioning that excitation wavelength was in long UV radiation at 360
nm. In addition, a predictive model simulating and modelling the rare
earths' molar percentages to approximate to the D65 white light
chromaticity coordinates is presented.
Filiaciones:
Flores, Dora-Luz:
Univ Autonoma Baja California, Carretera Transpeninsular Ensenada, Ensenada 22860, Baja California, Mexico
Gutierrez, Everardo:
Univ Autonoma Baja California, Carretera Transpeninsular Ensenada, Ensenada 22860, Baja California, Mexico
Cervantes, David:
Univ Autonoma Baja California, Carretera Transpeninsular Ensenada, Ensenada 22860, Baja California, Mexico
Chacon, Marco:
Univ Autonoma Baja California, Carretera Transpeninsular Ensenada, Ensenada 22860, Baja California, Mexico
Hirata, Gustavo:
Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Mexico City, DF, Mexico
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