Extended OLED operational lifetime through phosphorescent dopant profile management

Forrest, Stephen R.; Zhang, Yifan

Extended OLED operational lifetime through phosphorescent dopant profile management

Patent · Tue May 30 00:00:00 EDT 2017

OSTI ID:1360767

Forrest, Stephen R.; Zhang, Yifan

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.

Research Organization:: The Regents of the University of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: SC0001013

Assignee:: The Regents of the University of Michigan

Patent Number(s):: 9,666,822

Application Number:: 14/537,414

OSTI ID:: 1360767

Country of Publication:: United States

Language:: English

References (13)

Physical mechanism responsible for the stretched exponential decay behavior of aging organic light-emitting diodes Féry, C.; Racine, B.; Vaufrey, D. Applied Physics Letters, Vol. 87, Issue 21 https://doi.org/10.1063/1.2133922	journal	November 2005
Degradation of Organic/Organic Interfaces in Organic Light-Emitting Devices due to Polaron–Exciton Interactions Wang, Qi; Aziz, Hany ACS Applied Materials & Interfaces, Vol. 5, Issue 17, p. 8733-8739 https://doi.org/10.1021/am402537j	journal	August 2013
Direct evidence for degradation of polaron excited states in organic light emitting diodes Giebink, N. C.; D’Andrade, B. W.; Weaver, M. S. Journal of Applied Physics, Vol. 105, Issue 12 https://doi.org/10.1063/1.3151689	journal	June 2009
Blue organic electrophosphorescence using exothermic host–guest energy transfer Holmes, R. J.; Forrest, S. R.; Tung, Y. -J. Applied Physics Letters, Vol. 82, Issue 15 https://doi.org/10.1063/1.1568146	journal	April 2003
Intrinsic luminance loss in phosphorescent small-molecule organic light emitting devices due to bimolecular annihilation reactions Giebink, N. C.; D’Andrade, B. W.; Weaver, M. S. Journal of Applied Physics, Vol. 103, Issue 4 https://doi.org/10.1063/1.2884530	journal	February 2008
Microcavity two-unit tandem organic light-emitting devices having a high efficiency Cho, Ting-Yi; Lin, Chun-Liang; Wu, Chung-Chih Applied Physics Letters, Vol. 88, Issue 11 https://doi.org/10.1063/1.2185077	journal	March 2006
Charge Trapping Effect in Phosphorescent Organic Light-Emitting Diodes Lee, Jun Yeob Molecular Crystals and Liquid Crystals, Vol. 498, Issue 1 https://doi.org/10.1080/15421400802615147	journal	February 2009
Measuring the Efficiency of Organic Light-Emitting Devices Forrest, S. R.; Bradley, D. D. C.; Thompson, M. E. Advanced Materials, Vol. 15, Issue 13, p. 1043-1048 https://doi.org/10.1002/adma.200302151	journal	July 2003
Simplified calculation of dipole energy transport in a multilayer stack using dyadic Green’s functions Celebi, K.; Heidel, T. D.; Baldo, M. A. Optics Express, Vol. 15, Issue 4 https://doi.org/10.1364/OE.15.001762	journal	January 2007
Effects of mixed host spatial distribution on the efficiency of blue phosphorescent organic light-emitting diodes Lee, Sangmin; Tang, Ching. W.; Rothberg, Lewis. J. Applied Physics Letters, Vol. 101, Issue 4 https://doi.org/10.1063/1.4739499	journal	July 2012
The stacked OLED (SOLED): a new type of organic device for achieving high-resolution full-color displays Forrest, S. R.; Burrows, P. E.; Shen, Z. Synthetic Metals, Vol. 91, Issue 1-3 https://doi.org/10.1016/S0379-6779(97)03966-0	journal	December 1997
Very high-efficiency green organic light-emitting devices based on electrophosphorescence Baldo, M. A.; Lamansky, S.; Burrows, P. E. Applied Physics Letters, Vol. 75, Issue 1, p. 4-6 https://doi.org/10.1063/1.124258	journal	July 1999
White Stacked Electrophosphorescent Organic Light-Emitting Devices Employing MoO₃ as a Charge-Generation Layer Kanno, H.; Holmes, R. J.; Sun, Y. Advanced Materials, Vol. 18, Issue 3, p. 339-342 https://doi.org/10.1002/adma.200501915	journal	February 2006

Similar Records

Phosphorescent organic light emitting diodes with high efficiency and brightness

Patent · Wed Nov 11 23:00:00 EST 2015 · OSTI ID:1225699

Ultrabright fluorescent OLEDS using triplet sinks

Patent · Tue Jun 04 00:00:00 EDT 2013 · OSTI ID:1084353

Stable blue phosphorescent organic light emitting devices

Patent · Tue Aug 26 00:00:00 EDT 2014 · OSTI ID:1151770

Related Subjects

42 ENGINEERING

Extended OLED operational lifetime through phosphorescent dopant profile management

Citation Formats

References (13)

Similar Records

Related Subjects