Electroluminescent device and method for producing the same

Details Electroluminescent device and method for producing the same Electroluminescent device and method for producing the same

1996-07-02

1998-02-03

Nold, Charles

Stock material or miscellaneous articles

Composite

Of inorganic material

428691, 428917, 313504, 427 87, 427248B, 445 24, 156611, 156612, H05B 3300

Patent

active

057142742

ABSTRACT:
An electroluminescent device has a luminescent layer including an alkaline earth thiogallate doped with a luminescent center for producing blue light. An insulating layer disposed next to the luminescent layer includes a buffer area contacting the luminescent layer. The buffer area is made from a material which has an amorphous state at a temperature sufficient for crystallization of the alkaline earth thiogallate. Thus, when the device is manufactured, the luminescent layer can be formed in an amorphous state on the insulating layer and heat treated. Since the buffer layer remains in an amorphous state, the formation of alkaline earth sulfides which might degrade the color purity of emitted light at the interface of the crystalline luminescent layer and the amorphous buffer layer can be prevented.

REFERENCES:
Tsujiyama et al., "4.4: Bright-Blue Electroluminescence and Hysteresis Behavior in SrS:CeCl.sub.3 Thin Films", SID 86 Digest, pp. 37-40, 1986.

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