Fabrication of 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.
Claims17
A method of preparing a flexible organic light emitting device comprising:
- providing a flexible substrate coated with an indium tin oxide layer;
- fabricating an organic light emitting device on the flexible substrate, wherein fabrication of the organic light emitting device includes the step of vacuum depositing a hole transporting layer comprised of non-polymeric organic material 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.
A method of preparing a flexible organic light emitting device comprising:
- providing a flexible substrate coated with an indium tin oxide layer, wherein the indium tin oxide layer has a surface roughness that does not exceed about 3.6 nm;
- fabricating an organic light emitting device on the flexible substrate, wherein fabrication of the organic light emitting device includes the step of vacuum depositing a hole transporting layer comprised of non-polymeric organic material over the indium tin oxide layer.
A method of fabricating a flexible organic light emitting device comprising:
- providing a flexible substrate coated with an indium tin oxide layer;
- depositing a hole transporting layer consisting essentially of non-polymeric organic material over the indium tin oxide layer;
- depositing an electron transporting layer consisting essentially of non-polymeric organic material over the hole transporting layer;
- and
- depositing a cathode layer over the electron transporting layer;
- the indium tin oxide layer being 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.
A method of fabricating a flexible organic light emitting device comprising:
- providing a flexible substrate coated with an indium tin oxide layer, wherein the indium tin oxide layer has a surface roughness that does not exceed about 3.6 nm;
- depositing a hole transporting layer consisting essentially of non-polymeric organic material over the indium tin oxide layer;
- depositing an electron transporting layer consisting essentially of non-polymeric organic material over the hole transporting layer;
- and
- depositing a cathode layer over the electron transporting layer.
A method of fabricating a flexible organic light emitting device comprising:
- providing a flexible polyester substrate coated with an indium tin oxide layer, wherein the indium tin oxide layer has a surface roughness that does not exceed about 3.6 nm;
- depositing a layer of N,N′-diphenyl-N,N′-bis(3-methylpheny)1-1′biphenyl-4,4′diamine over the indium tin oxide anode layer;
- depositing a layer of tris-(8-hydroxyquinoline) aluminum over the N,N′-diphenyl-N,N′-bis(3-methylpheny)1-1′biphenyl-4,4′diamine layer;
- and
- depositing a metal layer over the tris-(8-hydroxyquinoline) aluminum layer.
A method of preparing a flexible organic light emitting device comprising:
- obtaining a flexible substrate having thereon a layer of indium tin oxide having a surface roughness that does not exceed about 3.6 nm;
- depositing a layer of organic small molecule material over the layer of indium tin oxide;
- depositing an electrode layer over the layer of organic small molecule material.
Dependencies are inferred from the claim text.