Extended OLED operational lifetime through phosphorescent dopant profile management

Forrest, Stephen R.; Zhang, Yifan

Title: Extended OLED operational lifetime through phosphorescent dopant profile management

Abstract

This disclosure relates, at least in part, an organic light emitting device, which in some embodiments comprises an anode; a cathode; a first emissive layer disposed between the anode and the cathode, the first emissive layer comprising an electron transporting compound and a phosphorescent emissive dopant compound; and wherein the phosphorescent emissive dopant compound has a concentration gradient, in the emissive layer, which varies from the cathode side of the first emissive layer to the anode side of the emissive layer.

Inventors:: Forrest, Stephen R.; Zhang, Yifan

Issue Date:: 2017-05-30

Research Org.:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1360767

Patent Number(s):: 9666822

Application Number:: 14/537,414

Assignee:: The Regents of the University of Michigan

Patent Classifications (CPCs):: H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
H01L2251/5346 - Graded composition
H01L2251/5384 - Multiple hosts in the emissive layer
H01L51/0072 - {comprising only nitrogen in the heteroaromatic polycondensed ringsystem, e.g. phenanthroline, carbazole}
H01L51/0085 - {comprising Iridium}
H01L51/5004 - {characterised by the interrelation between parameters of constituting active layers, e.g. HOMO-LUMO relation}
H01L51/5016 - {Triplet emission}
H01L51/5024 - {having a host comprising an emissive dopant and further additive materials, e.g. for improving the dispersability, for improving the stabilisation, for assisting energy transfer}
H01L51/5072 - {Electron transporting layer}
H01L51/5088 - {Carrier injection layer}

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DOE Contract Number:: SC0001013

Resource Type:: Patent

Resource Relation:: Patent File Date: 2014 Nov 10

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Forrest, Stephen R., and Zhang, Yifan. Extended OLED operational lifetime through phosphorescent dopant profile management.  United States: N. p., 2017. 
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                    Forrest, Stephen R., & Zhang, Yifan. Extended OLED operational lifetime through phosphorescent dopant profile management.  United States.

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                    Forrest, Stephen R., and Zhang, Yifan. Tue .  
        "Extended OLED operational lifetime through phosphorescent dopant profile management".  United States.  https://www.osti.gov/servlets/purl/1360767.

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@article{osti_1360767,

  title        = {Extended OLED operational lifetime through phosphorescent dopant profile management},

  author       = {Forrest, Stephen R. and Zhang, Yifan},

  abstractNote = {This disclosure relates, at least in part, an organic light emitting device, which in some embodiments comprises an anode; a cathode; a first emissive layer disposed between the anode and the cathode, the first emissive layer comprising an electron transporting compound and a phosphorescent emissive dopant compound; and wherein the phosphorescent emissive dopant compound has a concentration gradient, in the emissive layer, which varies from the cathode side of the first emissive layer to the anode side of the emissive layer.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2017},

  month        = {5}

}

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Title: Extended OLED operational lifetime through phosphorescent dopant profile management

Abstract

Citation Formats

Electroluminescent device with modified thin film luminescent zone patent, September 1988

Electroluminescent devices patent, September 1993

Photodetector with absorbing region having resonant periodic absorption between reflectors patent, February 1995

Article comprising a microcavity light source patent, October 1997

White light-emitting organic electroluminescent devices patent, November 1997

Transparent contacts for organic devices patent, December 1997

Multicolor organic light emitting devices patent, January 1998

High efficiency organic light emitting devices with light directing structures patent, November 1998

Vacuum deposited, non-polymeric flexible organic light emitting devices patent, December 1998

Output control of vertical microcavity light emitting device patent, April 1999

Multicolor display devices patent, January 2000

Fabrication of organic semiconductor devices using ink jet printing patent, July 2000

Displays having mesa pixel configuration patent, July 2000

Structure for high efficiency electroluminescent device patent, August 2000

Method for patterning devices patent, September 2001

OLEDs doped with phosphorescent compounds patent, October 2001

Intersystem crossing agents for efficient utilization of excitons in organic light emitting devices patent, October 2001

Low pressure vapor phase deposition of organic thin films patent, January 2002

Method for patterning organic thin film devices using a die patent, October 2002

Transparent contacts for organic devices patent, April 2003

Method for displacement chromatography patent, June 2003

Fabrication of non-polymeric flexible organic light emitting devices patent, August 2003

Process and apparatus for organic vapor jet deposition patent, October 2008

Organic phosphorescent light emitting device patent, March 2009

Organic light-emitting display patent, April 2009

Display with multiple emission layers patent, May 2009

Optically pumped semiconductor laser device patent, June 2009

Luminescent device patent, August 2009

Stacked organic electroluminescent units for white light emission provided with RGB color conversion portions patent, April 2010

Fluorescent filtered electrophosphorescence patent, August 2010

Apparatus and methods for providing a static interferometric display device patent, May 2011

Organic electroluminescence element having concentration variation of hole transporting light-emitting material patent, January 2012

Triazole derivative, and light-emitting element, light-emitting device, and electronic device with the use of triazole derivative patent, May 2012

III-nitride light-emitting devices with reflective engineered growth templates and methods of manufacture patent, August 2012

Organic electroluminescent device patent, January 2013

White phosphorescent organic light emitting devices patent, August 2013

Stable blue phosphorescent organic light emitting devices patent, October 2013

Organic light emitting element and display device using the element patent, March 2014

Organometallic complexes as phosphorescent emitters in organic LEDs patent-application, March 2002

Organic electroluminescent device patent-application, May 2002

Organometallic compounds and emission-shifting organic electrophosphorescence patent-application, December 2002

Organic light emitting devices having carrier blocking layers comprising metal complexes patent-application, April 2003

Phosphorescent compounds and devices comprising the same patent-application, April 2003

White light emitting oleds from combined monomer and aggregate emission patent-application, September 2003

Organic electroluminescent device patent-application, October 2003

Very Low Voltage, High Efficiency Phosphorescent OLED in a p-i-n Structure patent-application, December 2003

Organic electroluminescent device using mixture of phosphorescent material as light-emitting substance patent-application, December 2003

Transparent electrodes patent-application, September 2004

Cascaded organic electroluminescent devices with color filters patent-application, February 2005

Organic lights-emitting device with doped emission layer patent-application, March 2005

Doping of organic opto-electronic devices to extend reliability patent-application, April 2005

Organic light emitting device and display using the same patent-application, May 2005

Full color OLED and method for fabricating the same patent-application, May 2005

Organic electroluminescence device patent-application, June 2005

White light emitting organic electroluminescent device and organic electroluminescent display having the same patent-application, July 2005

OLED efficiency by utilization of different doping concentrations within the device emissive layer patent-application, August 2005

Organic electroluminescent device using mixture of phosphorescent material as light-emitting substance patent-application, November 2005

Tandem OLED having stable intermediate connectors patent-application, December 2005

White OLEDs with a color-compensated electroluminescent unit patent-application, April 2006

Photonic devices formed on substrates and their fabrication methods patent-application, July 2006

Compound, charge transporting material and organic electroluminescent element patent-application, August 2006

Hybrid OLED having phosphorescent and fluorescent emitters patent-application, October 2006

Light-emitting device patent-application, December 2006

Phosphorescent OLED with interlayer patent-application, May 2007

Light-emitting element, light-emitting device, and electronic device patent-application, January 2008

Materials and architectures for efficient harvesting of singlet and triplet excitons for white light emitting OLEDs patent-application, May 2008

White Organic Light Emitting Device patent-application, July 2008

Light Emissive Device patent-application, October 2008

Organometallic Complex, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Organometallic Complex patent-application, December 2008

White Organic Light Emitting Device patent-application, February 2009

Saturated Color Organic Light Emitting Devices patent-application, May 2009

Optical device comprising a charge transport layer of insoluble organic material and method for the production thereof patent-application, July 2009

Stable Blue Phosphorescent Organic Light Emitting Devices patent-application, December 2009

Organic Compound, Charge-Transporting Material, Composition for Charge-Transporting Material and Organic Electroluminescent Device patent-application, November 2009

Composition for Use in Organic Device, Polymer Film, and Organic Electroluminescent Element patent-application, February 2010

Organic Light-Emitting Device, Method Of Manufacturing The Same, And Flat Panel Display Device Including The Same patent-application, May 2013

Organic Light-Emitting Device patent-application, March 2014

Electroluminescent device with modified thin film luminescent zone
patent, September 1988

Electroluminescent devices
patent, September 1993

Photodetector with absorbing region having resonant periodic absorption between reflectors
patent, February 1995

Article comprising a microcavity light source
patent, October 1997

White light-emitting organic electroluminescent devices
patent, November 1997

Transparent contacts for organic devices
patent, December 1997

Multicolor organic light emitting devices
patent, January 1998

High efficiency organic light emitting devices with light directing structures
patent, November 1998

Vacuum deposited, non-polymeric flexible organic light emitting devices
patent, December 1998

Output control of vertical microcavity light emitting device
patent, April 1999

Multicolor display devices
patent, January 2000

Fabrication of organic semiconductor devices using ink jet printing
patent, July 2000

Displays having mesa pixel configuration
patent, July 2000

Structure for high efficiency electroluminescent device
patent, August 2000

Method for patterning devices
patent, September 2001

OLEDs doped with phosphorescent compounds
patent, October 2001

Intersystem crossing agents for efficient utilization of excitons in organic light emitting devices
patent, October 2001

Low pressure vapor phase deposition of organic thin films
patent, January 2002

Method for patterning organic thin film devices using a die
patent, October 2002

Transparent contacts for organic devices
patent, April 2003

Method for displacement chromatography
patent, June 2003

Fabrication of non-polymeric flexible organic light emitting devices
patent, August 2003

Process and apparatus for organic vapor jet deposition
patent, October 2008

Organic phosphorescent light emitting device
patent, March 2009

Organic light-emitting display
patent, April 2009

Display with multiple emission layers
patent, May 2009

Optically pumped semiconductor laser device
patent, June 2009

Luminescent device
patent, August 2009

Stacked organic electroluminescent units for white light emission provided with RGB color conversion portions
patent, April 2010

Fluorescent filtered electrophosphorescence
patent, August 2010

Apparatus and methods for providing a static interferometric display device
patent, May 2011

Organic electroluminescence element having concentration variation of hole transporting light-emitting material
patent, January 2012

Triazole derivative, and light-emitting element, light-emitting device, and electronic device with the use of triazole derivative
patent, May 2012

III-nitride light-emitting devices with reflective engineered growth templates and methods of manufacture
patent, August 2012

Organic electroluminescent device
patent, January 2013

White phosphorescent organic light emitting devices
patent, August 2013

Stable blue phosphorescent organic light emitting devices
patent, October 2013

Organic light emitting element and display device using the element
patent, March 2014

Organometallic complexes as phosphorescent emitters in organic LEDs
patent-application, March 2002

Organic electroluminescent device
patent-application, May 2002

Organometallic compounds and emission-shifting organic electrophosphorescence
patent-application, December 2002

Organic light emitting devices having carrier blocking layers comprising metal complexes
patent-application, April 2003

Phosphorescent compounds and devices comprising the same
patent-application, April 2003

White light emitting oleds from combined monomer and aggregate emission
patent-application, September 2003

Organic electroluminescent device
patent-application, October 2003

Very Low Voltage, High Efficiency Phosphorescent OLED in a p-i-n Structure
patent-application, December 2003

Organic electroluminescent device using mixture of phosphorescent material as light-emitting substance
patent-application, December 2003

Transparent electrodes
patent-application, September 2004

Cascaded organic electroluminescent devices with color filters
patent-application, February 2005

Organic lights-emitting device with doped emission layer
patent-application, March 2005

Doping of organic opto-electronic devices to extend reliability
patent-application, April 2005

Organic light emitting device and display using the same
patent-application, May 2005

Full color OLED and method for fabricating the same
patent-application, May 2005

Organic electroluminescence device
patent-application, June 2005

White light emitting organic electroluminescent device and organic electroluminescent display having the same
patent-application, July 2005

OLED efficiency by utilization of different doping concentrations within the device emissive layer
patent-application, August 2005

Organic electroluminescent device using mixture of phosphorescent material as light-emitting substance
patent-application, November 2005

Tandem OLED having stable intermediate connectors
patent-application, December 2005

White OLEDs with a color-compensated electroluminescent unit
patent-application, April 2006

Photonic devices formed on substrates and their fabrication methods
patent-application, July 2006

Compound, charge transporting material and organic electroluminescent element
patent-application, August 2006

Hybrid OLED having phosphorescent and fluorescent emitters
patent-application, October 2006

Light-emitting device
patent-application, December 2006

Phosphorescent OLED with interlayer
patent-application, May 2007

Light-emitting element, light-emitting device, and electronic device
patent-application, January 2008

Materials and architectures for efficient harvesting of singlet and triplet excitons for white light emitting OLEDs
patent-application, May 2008

White Organic Light Emitting Device
patent-application, July 2008

Light Emissive Device
patent-application, October 2008

Organometallic Complex, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Organometallic Complex
patent-application, December 2008

White Organic Light Emitting Device
patent-application, February 2009

Saturated Color Organic Light Emitting Devices
patent-application, May 2009

Optical device comprising a charge transport layer of insoluble organic material and method for the production thereof
patent-application, July 2009

Stable Blue Phosphorescent Organic Light Emitting Devices
patent-application, December 2009

Organic Compound, Charge-Transporting Material, Composition for Charge-Transporting Material and Organic Electroluminescent Device
patent-application, November 2009

Composition for Use in Organic Device, Polymer Film, and Organic Electroluminescent Element
patent-application, February 2010

Organic Light-Emitting Device, Method Of Manufacturing The Same, And Flat Panel Display Device Including The Same
patent-application, May 2013

Organic Light-Emitting Device
patent-application, March 2014

Organic Electronic Device For Lighting
patent-application, August 2014

Stable Blue Phosphorescent Organic Light Emitting Devices
patent-application, April 2015

Simplified calculation of dipole energy transport in a multilayer stack using dyadic Green’s functions
journal, January 2007