OLED device with fluoranthene electron transport materials
AssigneeGlobal OLED Technology LLC
InventorsWilliam J. Begley, Liang-Sheng Liao, Natasha Andrievsky
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Abstract
The invention provides an OLED device comprising a cathode, an anode, and having there between a light-emitting layer, further comprising, between the cathode and the light emitting layer, a non-luminescent electron transporting layer containing a compound with a 7,10-diaryl substituted fluoranthene nucleus having no aromatic rings annulated to the fluoranthene nucleus and desirably comprises still further an additional layer containing an organic alkali metal compound, located between the cathode and the electron transporting layer. Devices of the invention provide improvement in features such as efficiency, drive voltage, and operational stability.
Claims18
An OLED device comprising a cathode, an anode, and having there between a light-emitting layer, further comprising, between the cathode and the light emitting layer, a non-luminescent electron transporting layer containing a compound with a 7,10-diaryl substituted fluoranthene nucleus having no aromatic rings annulated to the fluoranthene nucleus, the fluoranthene compound having the following Formula (IIIa) or (IIIb):
- wherein:
- R2 and R4 are independently hydrogen or an aromatic group containing 6 to 24 carbon atoms with the proviso that R2 and R4 cannot both be hydrogen nor can R2 be joined with R to form a ring;
- R is hydrogen or an optional substituent;
- and
- n and m are independently 1-5.
An OLED device comprising a cathode, an anode, and having therebetween a light emitting layer,
- (a) comprising, between the cathode and the light emitting layer, a non-luminescent electron transporting layer containing a compound with a 7,10-diaryl-fluoranthene nucleus having no aromatic rings annulated to the nucleus;
- and
- (b) comprising still further an additional layer, containing an organic alkali metal compound, located between the cathode and the electron transporting layer,
- wherein the fluoranthene compound has the following Formula (IIIa) or (IIIb):
- R2 and R4 are independently hydrogen or an aromatic group containing 6 to 24 carbon atoms with the proviso that R2 and R4 cannot both be hydrogen nor can R2 be joined with R to form a ring;
- R is hydrogen or an optional substituent;
- and
- n and m are independently 1-5.
An OLED device comprising a cathode, an anode, and having therebetween a light emitting layer,
- (a) comprising, between the cathode and the light emitting layer, a non-luminescent electron transporting layer containing a compound with a 7,10-diaryl substituted fluoranthene nucleus having no aromatic rings annulated to the fluoranthene nucleus;
- and
- (b) comprising further an additional layer, containing a phenanthroline compound and an alkali or alkaline earth metal, located between the cathode and the electron transporting layer,
- wherein the fluoranthene compound has the following Formula (IIIa) or (IIIb):
- R2 and R4 are independently hydrogen or an aromatic group containing 6 to 24 carbon atoms with the proviso that R2 and R4 cannot both be hydrogen nor can R2 be joined with R to form a ring:,
- R is hydrogen or an optional substituent;
- and
- n and m are independently 1-5.
Dependencies are inferred from the claim text.