White organic light-emitting devices using rubrene layer
AssigneeEastman Kodak Company
InventorTukaram K. Hatwar
Life of this patent
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Abstract
An organic light-emitting diode (OLED) device which produces substantially white light includes a substrate; an anode disposed over the substrate; and a hole injecting layer disposed over the anode. The device further includes a hole-transport layer disposed over the hole injecting layer; a yellow light-emitting layer having rubrene or a derivative thereof greater than 50% by volume of the constituents of such yellow light-emitting layer that emits light in the yellow region of the spectrum and is disposed on the hole-transport layer; a light-emitting layer doped with a blue light-emitting compound, disposed directly on the yellow light-emitting layer; an electron-transport layer disposed over the blue light-emitting layer; and a cathode disposed over the electron-transport layer.
Claims53
An organic light-emitting diode (OLED) device which produces substantially white light, comprising:
- a) a substrate;
- b) an anode disposed over the substrate;
- c) a hole injecting layer disposed over the anode;
- d) a hole-transport layer disposed over the hole injecting layer;
- e) a yellow light-emitting layer having rubrene or a derivative thereof greater than 50% by volume of the constituents of such yellow light-emitting layer that emits light in the yellow region of the spectrum and is disposed on the hole-transport layer;
- f) a light-emitting layer doped with a blue light-emitting compound, disposed directly on the yellow light-emitting layer;
- g) an electron-transport layer disposed over the blue light-emitting layer;
- and
- h) a cathode disposed over the electron-transport layer.
An organic light-emitting diode device which produces substantially white light, comprising:
- a) a substrate;
- b) an anode disposed over the substrate;
- c) a hole injecting layer disposed over the anode;
- d) a hole-transport layer disposed over the hole injecting layer;
- e) a light-emitting layer doped with a blue light-emitting compound, disposed directly on the hole-transport layer;
- f) a yellow light-emitting layer having rubrene or a derivative thereof greater than 50% by volume of the constituents of such yellow light-emitting layer that emits light in the yellow region of the spectrum and is disposed on the blue-emitting layer;
- g) an electron-transport layer disposed directly over the yellow light-emitting layer;
- and
- h) a cathode disposed over the electron-transport layer.
An organic light-emitting diode device which produce substantially white light, comprising:
- a) a substrate;
- b) an anode disposed over the substrate;
- c) a hole injecting layer disposed over the anode;
- d) a hole-transport layer disposed over the hole injecting layer;
- e) a first yellow light-emitting layer having rubrene or a derivative thereof greater than 50% by volume of the constituents of such first yellow light-emitting layer that emits light in the yellow region of the spectrum and is disposed on the hole-transport layer;
- f) a light-emitting layer doped with a blue light-emitting compound, disposed directly on the first yellow light-emitting layer;
- g) a second yellow light-emitting layer having rubrene or a derivative thereof greater than 50% by volume of the constituents of such yellow light-emitting layer that emits light in the yellow region of the spectrum and is disposed on the blue-emitting layer;
- h) an electron-transport layer disposed directly over the second yellow light-emitting layer;
- and
- i) a cathode disposed over the electron-transport layer.
An organic light-emitting diode device which produce substantially white light, comprising:
- a) a substrate;
- b) an anode disposed over the substrate;
- c) a hole injecting layer disposed over the anode;
- d) a hole-transport layer disposed over the hole injecting layer;
- e) a first yellow light-emitting layer having rubrene or a derivative thereof greater than 50% by volume of the constituents of such first yellow light-emitting layer that emits light in the yellow region of the spectrum and is disposed on the hole-transport layer;
- f) a light-emitting layer having a host material doped with a blue light-emitting compound, disposed directly on the first yellow light-emitting layer;
- g) a second yellow light-emitting layer having rubrene or a derivative thereof greater than 50% by volume of the constituents of such yellow light-emitting layer that emits light in the yellow region of the spectrum and is disposed on the blue-emitting layer;
- h) a green emitting layer disposed on the second yellow emitting layer;
- i) an electron-transport layer disposed directly over the green light-emitting layer;
- and
- j) a cathode disposed over the electron-transport layer.
Dependencies are inferred from the claim text.