Electroluminescent device and method for producing same

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

1996-08-26

1998-05-12

Patel, Nimeshkumar

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313467, 313486, H05B 3314, H05B 3320

Patent

active

057511080

ABSTRACT:
In an electroluminescent device wherein a first electrode, a first insulating layer, a luminescent layer, a second insulating layer, and a second electrode are laminated in that order on a transparent electrode, the luminescent layer is made of ZnS as a host material and Tb, O, F, and Cl as additives Cl/Tb and Cl/F atomic ratios in the luminescent layer are each between 0.002 and 0.2 inclusively, and Cl concentration in the luminescent layer is between 0.002 at % and 0.2 at % inclusively. By adding a predetermined amount of Cl as mentioned above, the luminescent efficiency and luminescent brightness of the electroluminescent device can be improved.

REFERENCES:
patent: 4508610 (1985-04-01), Freeman et al.
patent: 5275840 (1994-01-01), Mikami et al.
patent: 5635111 (1997-06-01), Kawano et al.

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