Artículo
New single-phase, white-light-emitting phosphors based on δ-Gd 2Si2O7 for solid-state lighting
Autor/es | Fernández Carrión, Alberto José
Ocaña Jurado, Manuel García Sevillano, Jorge Cantelar, Eugenio Becerro Nieto, Ana Isabel |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2014 |
Fecha de depósito | 2017-05-22 |
Publicado en |
|
Resumen | Two new white-light (WL)-emitting phosphors (δ-Gd2Si 2O7:Dy and δ-Gd2Si2O 7:Eu,Tb) have been synthesized by the sol-gel method. The Gd-Ln 3+ (Ln3+= Dy3+, Tb3+, Eu 3+) energy-transfer band has been used to excite both ... Two new white-light (WL)-emitting phosphors (δ-Gd2Si 2O7:Dy and δ-Gd2Si2O 7:Eu,Tb) have been synthesized by the sol-gel method. The Gd-Ln 3+ (Ln3+= Dy3+, Tb3+, Eu 3+) energy-transfer band has been used to excite both phosphors, which provides an enhancement of the Ln3+ emissions. First, WL was generated from δ-Gd2Si2O7:xDy thanks to the particular ratio of the blue and yellow emissions observed in all three compositions, which had chromatic coordinates of x = 0.30, y = 0.33 and CCT values of between 7077 and 6721 K. The decay curves of the main transitions of Dy3+ showed a maximum lifetime value for δ-Gd 2Si2O7:0.5%Dy, which is, therefore, the most efficient doping level. Second, a broad spectral range, single-phase, WL-emitting phosphor was generated by codoping δ-Gd2Si 2O7 with Tb3+ and Eu3+. The composition δ-Gd2Si2O7:0.3%Eu 3+;0.8%Tb3+ showed CIE coordinates well inside the ideal WL region of the CIE diagram and a CCT value of 5828 K. The single-phase WL-emitting phosphors presented in this paper are promising materials to be used in white solid-state lighting systems and field-emission displays due to the advantages provided both by Gd3+ ions and by the high thermal and chemical stabilities of the rare earth disilicate matrix. |
Identificador del proyecto | JA FQM 06090
201460E005 MAT2011-23593 MAT2012-34919-SONAMFIBIOS |
Cita | Fernández Carrión, A.J., Ocaña Jurado, M., García Sevillano, J., Cantelar, E. y Becerro, A.I. (2014). New single-phase, white-light-emitting phosphors based on δ-Gd 2Si2O7 for solid-state lighting. Journal of Physical Chemistry C, 118 (31), 1-25. |
Ficheros | Tamaño | Formato | Ver | Descripción |
---|---|---|---|---|
Fernandez Carrion et al JPCC ... | 669.5Kb | [PDF] | Ver/ | |