Gallium‐rich CaGa α S β :Ce as a new blue electroluminescent phosphor | Zendy

Kato A. | Zendy; Katayama M. | Zendy; Mizutani A. | Zendy; Ito N. | Zendy; Hattori T. | Zendy

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Gallium‐rich CaGa α S β :Ce as a new blue electroluminescent phosphor

Author(s) -

Kato A.,

Katayama M.,

Mizutani A.,

Ito N.,

Hattori T.

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 - 10.1889/1.1985196

Subject(s) - phosphor , electroluminescence , materials science , gallium , caga , chemical vapor deposition , annealing (glass) , luminance , optoelectronics , analytical chemistry (journal) , optics , chemistry , physics , nanotechnology , layer (electronics) , biochemistry , chromatography , virulence , metallurgy , composite material , gene

— Ga‐rich CaGa α S β : Ce thin films, of which the Ga/Ca ratio was 2.5–4, were grown by metalorganic chemical vapor deposition. After post‐annealing at 650°C, a new substance, different from the ordinary CaGa 2 S 4 , grew. This was confirmed by XRD and by a spectral shift of the Ce 3+ emission. This phosphor was found not only to emit a deeper blue, ( x , y ) = (0.15, 0.16), than CaGa 2 S 4 : Ce, ( x , y ) = (0.15, 0.19), but also to be electroluminescent. Its luminance was 2 cd/m 2 at 40 V above threshold at a frame frequency of 120 Hz.

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