Organic light emitting device (OLED) display with improved light emission using a metallic anode
First Claim
1. A bottom-emitting OLED device, comprising:
- (a) a transparent substrate;
(b) a reflective, weakly absorbing, and conductive anode layer including a metal or metal alloy or both formed over the substrate;
(c) a hole-injection layer deposited over the reflective, weakly absorbing, and conductive anode layer;
(d) a plurality of organic layers formed over the hole-injection layer and including an emissive layer having electroluminescent material and an electron transport layer disposed over the emissive layer;
(e) a reflective and conductive cathode including a metal or metal alloy or both provided over the electron transport layer; and
(f) the transparency and reflectivity of the anode structure, reflectivity of cathode structure, and the thickness of the organic layers between the electrodes being selected to change the internal reflection of light to thereby improve the emission and obtain through-substrate exceeding that of an optimized control device not having the reflective, weakly absorbing, and conductive anode.
1 Assignment
0 Petitions
Accused Products
Abstract
OLED devices, suitable for top and bottom emitters is disclosed. For the top emitting OLED it includes a transparent substrate; a reflective, weakly absorbing, and conductive anode layer including a metal or metal alloy or both formed over the substrate; a hole-injection layer; a plurality of organic layers formed over the hole-injection layer and including an emissive layer having electroluminescent material and an electron transport layer disposed over the emissive layer; a reflective and conductive cathode including a metal or metal alloy or both provided over the electron transport layer; and the transparency and reflectivity of the anode structure, reflectivity of cathode structure, and the thickness of the organic layers between the electrodes being selected to change the internal reflection of light to thereby improve the emission and obtain luminance through-substrate exceeding that of an optimized control device not having the reflective, weakly absorbing, and conductive anode.
-
Citations
41 Claims
-
1. A bottom-emitting OLED device, comprising:
-
(a) a transparent substrate;
(b) a reflective, weakly absorbing, and conductive anode layer including a metal or metal alloy or both formed over the substrate;
(c) a hole-injection layer deposited over the reflective, weakly absorbing, and conductive anode layer;
(d) a plurality of organic layers formed over the hole-injection layer and including an emissive layer having electroluminescent material and an electron transport layer disposed over the emissive layer;
(e) a reflective and conductive cathode including a metal or metal alloy or both provided over the electron transport layer; and
(f) the transparency and reflectivity of the anode structure, reflectivity of cathode structure, and the thickness of the organic layers between the electrodes being selected to change the internal reflection of light to thereby improve the emission and obtain through-substrate exceeding that of an optimized control device not having the reflective, weakly absorbing, and conductive anode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A top-emitting OLED device, comprising:
-
(a) a transparent or opaque substrate;
(b) a reflective, substantially opaque, and conductive anode layer including a metal or metal alloy or both formed over the substrate;
(c) a hole-injection layer deposited over the reflective, substantially opaque, and conductive anode layer;
(d) a plurality of organic layers formed over the hole-injection layer and including an emissive layer having electroluminescent material and an electron transport layer disposed over the emissive layer;
(e) a reflective, semitransparent, and conductive cathode including a metal or metal alloy or both provided over the electron transport layer; and
(f) the reflectivity of the anode structure, the transparency of the cathode, and the thickness of the organic layers between the electrodes being selected to change the internal reflection of light to thereby improve the emission through the top electrode. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
-
Specification