Organic light emitting device structure for obtaining chromaticity stability

Tung, Yeh-Jiun; Ngo, Tan

Organic light emitting device structure for obtaining chromaticity stability

Patent · Tue May 01 00:00:00 EDT 2007

OSTI ID:909156

Tung, Yeh-Jiun ^[1]; Ngo, Tan ^[2]

Princeton, NJ
Levittown, PA

The present invention relates to organic light emitting devices (OLEDs). The devices of the present invention are efficient white or multicolored phosphorescent OLEDs which have a high color stability over a wide range of luminances. The devices of the present invention comprise an emissive region having at least two emissive layers, with each emissive layer comprising a different host and emissive dopant, wherein at least one of the emissive dopants emits by phosphorescence.

Research Organization:: Universal Display Corporation (Ewing, NJ)

Sponsoring Organization:: United States Department of Energy

DOE Contract Number:: FG02-02ER83565

Assignee:: Universal Display Corporation (Ewing, NJ)

Patent Number(s):: 7,211,823

Application Number:: 10/761,980

OSTI ID:: 909156

Country of Publication:: United States

Language:: English

References (6)

Highly efficient phosphorescent emission from organic electroluminescent devices Baldo, M. A.; O'Brien, D. F.; You, Y. Nature, Vol. 395, Issue 6698, p. 151-154 https://doi.org/10.1038/25954	journal	September 1998
Multilayer White Light-Emitting Organic Electroluminescent Device Kido, J.; Kimura, M.; Nagai, K. Science, Vol. 267, Issue 5202 https://doi.org/10.1126/science.267.5202.1332	journal	March 1995
High-efficiency electrophosphorescent organic light-emitting diodes with double light-emitting layers Zhou, X.; Qin, D. S.; Pfeiffer, M. Applied Physics Letters, Vol. 81, Issue 21 https://doi.org/10.1063/1.1522495	journal	November 2002
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
Nearly 100% internal phosphorescence efficiency in an organic light-emitting device Adachi, Chihaya; Baldo, Marc A.; Thompson, Mark E. Journal of Applied Physics, Vol. 90, Issue 10 https://doi.org/10.1063/1.1409582	journal	November 2001
Palladium-catalyzed synthesis of triarylamines from aryl halides and diarylamines Yamamoto, Toshihide; Nishiyama, Masakazu; Koie, Yasuyuki Tetrahedron Letters, Vol. 39, Issue 16 https://doi.org/10.1016/S0040-4039(98)00202-0	journal	April 1998

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