Bilayer polymer electroluminescent device featuring...

H - Electricity – 01 – J

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Details

H01J 1/62 (2006.01) B32B 9/00 (2006.01) C09K 11/06 (2006.01) H01L 51/50 (2006.01) H05B 33/14 (2006.01)

Patent

CA 2307035

An electroluminescent device includes a first polymeric layer (1) as a hole transport/electron blocking layer and a second polymeric layer (2) as an electron transporting emissive layer, wherein the first layer and the second layer are in electrical contact so as to form an interface being capable of producing an exciplex-like emission upon a current being passed through the interface. The first layer has a greater hole transport capability than the second layer, and the second layer having greater electron transport capability than the first layer.

La présente invention concerne un dispositif électroluminescent comprenant une première couche polymère (1) comme une couche de transport de trous/blocage d'électrons et une deuxième couche polymère (2) comme une couche émissive de transport d'électrons, la première couche et la deuxième couche étant en contact électrique afin de former une interface capable de produire une émission de type exciplexe sur un courant passant dans l'interface. La première couche est dotée d'une possibilité de transport de trous supérieure à celle de la deuxième couche, et la deuxième couche est dotée d'une possibilité de transport d'électrons supérieure à celle de la première couche.

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