Electroluminescence element and method for fabricating same

Details Electroluminescence element and method for fabricating same Electroluminescence element and method for fabricating same

1995-09-06

1998-05-05

Patel, Nimeshkumar

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313506, H01J 163

Patent

active

057479291

ABSTRACT:
A thin-film electroluminescence element is formed by laminating, in order, on a glass substrate which is an insulating substrate, a first transparent electrode including optically transparent ZnO, a first insulating layer including optically transparent strontium titanate, a luminescent layer including CaGa.sub.2.9 S.sub.4.2 to which Ce is added as a luminescent center, a second insulating layer including optically transparent strontium titanate and a second transparent electrode including optically transparent ZnO. The optical spectrum of the luminescent layer deviates towards a short wavelength side due to the crystal structure changing and the ligand field surrounding the Ce changing slightly due to the existence of excess Ga in the luminescent layer. Also, because calcium thiogallate is used, high light intensity can be maintained.

REFERENCES:
patent: 5309070 (1994-05-01), Sun et al.
patent: 5612592 (1997-03-01), Katayama
Benalloul et al, "IIA-III.sub.2 -S.sub.4 ternary compounds: New host matrices for full color thin film electrolumines cence displays", Appln. Phys. Lett., 63(14), 4 Oct. 1993: pp. 1954-1956.
Barrow et al, "A high Contrast, Full Color, 320.256 Line TFEL Display", 1994 International display Research conference, 10-13 Oct. 1994: pp. 448-451.
Barrow et al, "A New Class of Blue TFEL Phosphors with Application to a VGA Full-Color display", SID 93 Digest, 1993: pp. 761-764.

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