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Color‐coordinate control in TFEL devices using multicomponent oxide phosphors
Author(s) -
Minami Tadatsugu,
Kuroi Yoshikiro,
Yamada Hiroyuki,
Takata Shinzo
Publication year - 1998
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1985199
Subject(s) - phosphor , chromaticity , materials science , luminance , oxide , luminous efficacy , analytical chemistry (journal) , optoelectronics , optics , chemistry , nanotechnology , layer (electronics) , physics , metallurgy , chromatography
— This paper reports on attempts to control the color coordinate of the green emission from TFEL devices by varying the composition of multicomponent oxide phosphors in the host materials. In TFEL devices using multicomponent oxide phosphors composed of combinations of ZnGa 2 O 4 : Mn, ZnAl 2 O 4 : Mn, and MgGa 2 O 4 : Mn, the substitution of group‐III element sites rather than that of group‐II element sites is more effective for green‐color‐coordinate control. As for Zn(Ga z Al 1−z ) 2 O 4 : Mn or Mg z Zn 1−z (Ga z Al 1−z )O 4 : Mn phosphors, the EL emission spectra from the TFEL devices could also be controlled; consequently, the CIE chromaticity color coordinate could be changed. EL characteristics such as luminance and luminous efficacy remained relatively unchanged as the composition was varied up to about z = 0.5. A high‐luminance green emission suitable for full‐color displays was realized by TFEL devices using a multicomponent oxide phosphor such as Zn(Ga 0.5 Al 0.5 ) 2 O 4 : c Mn.