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US 6,888,306 B2Granted
Vacuum deposited, non-polymeric flexible organic light emitting devices
AssigneeThe Trustees of Princeton University
InventorsGong Gu, Paul Burrows, Stephen R. Forrest
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Abstract
An organic light emitting device (OLED) is disclosed for which the hole transporting layer, the electron transporting layer and/or the emissive layer, if separately present, is comprised of a non-polymeric material. A method for preparing such OLED's using vacuum deposition techniques is further disclosed.
Claims25
An organic light emitting device, comprising:
- a flexible substrate having thereon a layer of indium tin oxide having a surface roughness that does not exceed about 3.6 nm;
- a first layer of organic small molecule material disposed over the layer of indium tin oxide;
- an electrode disposed over the layer of organic small molecule material.
An organic light emitting device, comprising:
- an indium tin oxide layer coated on a flexible substrate;
- a hole transport layer further comprising a non-polymeric organic material disposed over the indium tin oxide layer;
- wherein the indium tin oxide layer is sufficiently uniform such that bending of the device does not appreciably change either the current-voltage or the light-current characteristics of the device relative to the current-voltage or light-current characteristics of the device prior to bending.
An organic light emitting device, comprising:
- an indium tin oxide layer disposed over a flexible substrate, wherein the indium tin oxide layer has a surface roughness that does not exceed about 3.6 nm;
- a hole transport layer disposed over the indium tin oxide layer, wherein the hole transport layer comprises a non-polymeric organic material.
An organic light emitting device, comprising:
- an indium tin oxide layer disposed over a flexible substrate, wherein the indium tin oxide layer has a surface roughness that does not exceed about 3.6 nm;
- a hole transport layer disposed over the indium tin oxide layer, wherein the hole transport layer comprises a non-polymeric organic material;
- an electron transport layer disposed over the hole transport layer, wherein electron transport layer comprises a non-polymeric organic material;
- a cathode disposed over the electron transport layer;
- wherein the indium tin oxide layer is sufficiently uniform such that bending of the device does not appreciably change either the current-voltage or the light-current characteristics of the device relative to the current-voltage or light-current characteristics of the device prior to bending.
2 more elements
An organic light emitting device, comprising:
- an indium tin oxide layer, wherein the indium tin oxide layer has a surface roughness that does not exceed about 3.6 nm, and wherein the indium tin oxide layer is coated on a flexible substrate;
- a hole transporting layer consisting essentially of non-polymeric organic material disposed over the indium tin oxide layer;
- an electron transporting layer consisting essentially of non-polymeric organic material disposed over the hole transporting layer;
- and
- a cathode layer disposed over the electron transporting layer.
2 more elements
An organic light emitting device, comprising:
- an indium tin oxide layer coated onto a flexible polyester substrate, wherein the indium tin oxide layer has a surface roughness that does not exceed about 3.6 nm;
- a layer of N,N′-diphenyl-N,N′-bis(3-methylpheny)1-1′biphenyl-4,4′diamine disposed over the indium tin oxide anode layer;
- a layer of tris-(8-hydroxyquinoline)aluminum disposed over the N,N′-diphenyl-N,N′-bis(3-methylpheny)1-1′biphenyl-4,4′diamine layer;
- and
- a metal layer disposed over the tris-(8-hydroxyquinoline)aluminum layer.
2 more elements
An organic light emitting device, comprising:
- a first electrode disposed on a flexible substrate, the first electrode having a surface roughness that does not exceed about 3.6 nm;
- a first layer of organic small molecule material disposed over the first electrode;
- a second electrode disposed over the first layer of organic small molecule material.
An organic light emitting device, comprising:
- a first electrode disposed on a flexible substrate;
- a first layer of organic small molecule material disposed over the first electrode;
- a second electrode disposed over the first layer of organic small molecule material;
- wherein the first electrode is sufficiently uniform such that bending of the device does not appreciably change either the current-voltage or the light-current characteristics of the device relative to the current-voltage or light-current characteristics of the device prior to bending.
1 more element
Dependencies are inferred from the claim text.