White organic light-emitting devices with improved performance

1. An organic light-emitting diode (OLED) device that produces white light, including:

a) an anode;

b) a hole-transporting layer disposed over the anode;

c) a blue light-emitting layer disposed over the hole-transporting layer, wherein the blue-light emitting layer comprises a host material and a blue-light emitting material, wherein the concentration of said blue-light emitting material is in a range of greater than 0 and less than 20% by volume of the host material wherein the blue light emitting material is selected from a bis(azinyl)amine boron complex;

d) an electron-transporting layer disposed over the blue light-emitting layer;

e) a cathode disposed over the electron-transporting layer;

f) wherein the hole-transporting layer comprises an entire layer or a partial portion of a layer in contact with the blue light-emitting layer and contains a light-emitting naphthacene compound having formula (I)

wherein

R 1 , R 2 , R 3 , R 4 , R 5 and R 6 represent substituents on each ring where each substituent is individually selected from alkyl or substituted alkyl groups of from 1 to 24 carbon atoms; aryl or substituted aryl groups of from 6 to 20 carbon atoms; carbon atoms from 4 to 24 necessary to complete a fused aromatic ring; heterocyclic or substituted heterocyclic groups of from 5 to 24 carbon atoms, which may be bonded via a single bond, or may complete a fused heteroaromatic ring system; alkoxy or aryloxy groups, ailcoxylamino, alkylaniino, and arylamino groups of from 1 to 24 carbon atoms; and fluorine, chlorine, bromine or cyano substituents;

a, b, c and d are individually selected from 0 through 5;

e and f are individually selected from 0 through 4;

provided that not all of a, b, c, d, e, and f are 0;

provided that at least one of R 1 through R 4 is not a fused ring group and at least one of R 1 through R 6 is a substituent; and

provided further that neither both R 1 and R 4 nor both R 2 and R 3 are heterocyclic; and

wherein the electron-transporting layer is transparent.

2. An organic light-emitting diode (OLED) device that produces white light, including:

a) an anode;

b) a hole-transporting layer disposed over the anode;

c) a blue light-emitting layer disposed over the hole-transporting layer, wherein the blue-light emitting layer comprises a host material and a blue-light emitting material, wherein the concentration of said blue-light emitting material is in a range of greater than 0 and less than 20% by volume of the host material wherein the blue light emitting material is selected from a perylene compound or its derivatives and a bis(azinyl)amine boron complex;

d) an electron-transporting layer disposed over the blue light-emitting layer;

e) a cathode disposed over the electron-transporting layer;

f) wherein the hole-transporting layer comprises an entire layer or a partial portion of a layer in contact with the blue light-emitting layer and contains a light-emitting naplithacene compound having formula (I)

wherein

R 1 , R 2 , R 3 , R 4 , R 5 and R 6 represent substituents on each ring where each substituent is individually selected from alkyl or substituted ailcyl groups of from 1 to 24 carbon atoms; aryl or substituted aryl groups of from 6 to 20 carbon atoms; carbon atoms from 4 to 24 necessary to complete a fused aromatic ring;

heterocyclic or substituted heterocyclic groups of from 5 to 24 carbon atoms, which may be bonded via a single bond, or may complete a fused heteroaromatic ring system; alkoxy or aryloxy groups, alkoxylamino, alkylamino, and arylamino groups of from 1 to 24 carbon atoms; and fluorine, chlorine, bromine or cyano substituents;

a, b, c and d we individually selected from 0 through 5;

e and f are individually selected from 0 through 4;

provided that not all of a, b, c, d, e and f are 0;

provided that at least one of R 1 through R 4 is not a fused ring group and at least one of R 1 through R 6 is a substituent; and

provided further that neither both R 1 and R 4 nor both R 2 and R 3 are heterocyclic;

wherein the hole-transporting layer and the blue-light emitting layers comprise hosts and emitting dopants and are co-doped with other dopants; and

wherein the co-dopant in the hole-transporting layer is t-BuDPN and the co-dopant in the blue-light emitting layer is NPB.