Light emitting device

Details Light emitting device Light emitting device

2007-03-27

2007-03-27

Smith, Zandra V. (Department: 2822)

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

With particular dopant concentration or concentration profile

C257S103000, C257S040000

Reexamination Certificate

active

10072507

ABSTRACT:
A light emitting device and electronic equipment having a long life at a low electric power consumption are provided. A hole transporting region composed of a hole transporting material, an electron transporting region composed of an electron transporting material, and a mixture region in which both the hole transporting material and the electron transporting material are mixed at a fixed ratio are formed within an organic compound film. Regions having a concentration gradient are formed between the mixture region and carrier transporting regions until the fixed ratio is achieved. In addition, by doping a light emitting material into the mixture region, functions of hole transportation, electron transportation, and light emission can be respectively expressed while all of the interfaces existing between layers of a conventional lamination structure are removed. Organic light emitting elements having low electric power consumption and a long life can thus be provided, and light emitting devices and electronic equipment can be manufactured using the organic light emitting elements.

REFERENCES:
patent: 3654525 (1972-04-01), Maricle et al.
patent: 5017863 (1991-05-01), Mellitz
patent: 5039657 (1991-08-01), Goldman et al.
patent: 5170990 (1992-12-01), Kamiya et al.
patent: 5256945 (1993-10-01), Imai et al.
patent: 5271089 (1993-12-01), Ozawa
patent: 5281489 (1994-01-01), Mori et al.
patent: 5486406 (1996-01-01), Shi
patent: 5513499 (1996-05-01), DeRijke
patent: 5635308 (1997-06-01), Inoue et al.
patent: 5719467 (1998-02-01), Antoniadis et al.
patent: 5817431 (1998-10-01), Shi et al.
patent: 5853905 (1998-12-01), So et al.
patent: 5858563 (1999-01-01), Sano et al.
patent: 5925472 (1999-07-01), Hu et al.
patent: 5925980 (1999-07-01), So et al.
patent: 5955836 (1999-09-01), Boerner et al.
patent: 5989737 (1999-11-01), Xie et al.
patent: 6030715 (2000-02-01), Thompson et al.
patent: 6097147 (2000-08-01), Baldo et al.
patent: 6121727 (2000-09-01), Kanai et al.
patent: 6130001 (2000-10-01), Shi et al.
patent: 6132280 (2000-10-01), Tanaba et al.
patent: 6215462 (2001-04-01), Yamada et al.
patent: 6228228 (2001-05-01), Singh et al.
patent: 6237529 (2001-05-01), Spahn
patent: 6275649 (2001-08-01), Nagashima et al.
patent: 6284050 (2001-09-01), Shi et al.
patent: 6285039 (2001-09-01), Kobori et al.
patent: 6310360 (2001-10-01), Forrest et al.
patent: 6326091 (2001-12-01), Schoo et al.
patent: 6346973 (2002-02-01), Shibamoto et al.
patent: 6368730 (2002-04-01), Kishimoto et al.
patent: 6372154 (2002-04-01), Li
patent: 6392250 (2002-05-01), Aziz et al.
patent: 6392339 (2002-05-01), Aziz et al.
patent: 6396209 (2002-05-01), Kido et al.
patent: 6413656 (2002-07-01), Thompson et al.
patent: 6432255 (2002-08-01), Sun et al.
patent: 6458475 (2002-10-01), Adachi et al.
patent: 6468676 (2002-10-01), Ueda et al.
patent: 6495198 (2002-12-01), Peng
patent: 6517996 (2003-02-01), Chao et al.
patent: 6528824 (2003-03-01), Yamagata et al.
patent: 6541909 (2003-04-01), Motomatsu
patent: 6558817 (2003-05-01), Ueda et al.
patent: 6566807 (2003-05-01), Fujita et al.
patent: 6603140 (2003-08-01), Kobori et al.
patent: 6614175 (2003-09-01), Aziz et al.
patent: 6831406 (2004-12-01), Fukuyama et al.
patent: 2001/0051207 (2001-12-01), Yamagata et al.
patent: 2002/0018912 (2002-02-01), Jung et al.
patent: 2002/0038867 (2002-04-01), Kobori et al.
patent: 2002/0074935 (2002-06-01), Kwong et al.
patent: 2002/0081767 (2002-06-01), Kawashima
patent: 2002/0086180 (2002-07-01), Seo et al.
patent: 2002/0093283 (2002-07-01), Seo et al.
patent: 2002/0101154 (2002-08-01), Seo et al.
patent: 2002/0105005 (2002-08-01), Seo et al.
patent: 2002/0109136 (2002-08-01), Seo et al.
patent: 2002/0113546 (2002-08-01), Seo et al.
patent: 2002/0121860 (2002-09-01), Seo et al.
patent: 2002/0139303 (2002-10-01), Yamazaki et al.
patent: 2002/0155632 (2002-10-01), Yamazaki et al.
patent: 2003/0010288 (2003-01-01), Yamazaki et al.
patent: 2003/0118950 (2003-06-01), Chao et al.
patent: 2003/0134145 (2003-07-01), Toguchi et al.
patent: 366598 (1999-08-01), None
patent: 1 011 155 (2000-06-01), None
patent: 1 065 737 (2001-01-01), None
patent: 1065737 (2001-01-01), None
patent: 1 220 340 (2002-07-01), None
patent: 03-114197 (1991-05-01), None
patent: 04-357694 (1992-10-01), None
patent: 04-357694 (1992-12-01), None
patent: 10-233288 (1998-09-01), None
patent: 2000-208262 (2000-07-01), None
patent: 2001-023776 (2001-01-01), None
patent: 2001-52870 (2001-02-01), None
patent: 243470 (1995-03-01), None
patent: TW-366598 (1999-08-01), None
patent: 451601 (2001-08-01), None
patent: WO 98/08360 (1998-02-01), None
patent: WO 02/47457 (2002-06-01), None
J. Kido et al. “Multilayer white light-emitting organic electroluminescent device.” Science 267: 1995. p. 1332-1334.
Takeshi Nishi et al.; “High Efficiency TFT-OLED Display with Iridium-Complex As Triplet Emissive Center”;Proceedings of the 10th International Workshop on Inorganic and Organic Electroluminescence, pp. 353-356, Dec. 4-7, 2000.
Invitation to Respond to Written Opinion w/International Search Report, 6 pages, Jun. 10, 2004.
Tsutsui, “New Aspect of Research and Development of Organic EL”,Bulletin of organic molecular/bioelectronics, Subcommittee of Society of Applied Physics, vol. 11, No. 1, p. 8, 2000 (including partial translation).
Naka et al., “Organic Electroluminescent Devices Using a Mixed Single Layer,”Japanese Journal of Applied Physics, vol. 33, Part 2, No. 12B, pp. L1772-1774, 1994.
Tang et al. “Organic electroluminescent diodes.” Applied Physics Letters 51(12): 1987. p. 913-915.
Kijima et al. “A blue organic light emitting diode.” Jpn. J. Appl. Phys. 38: 1999. p. 5274-5277.
C. Adachi et al. “Electroluminescence in organic films with three-layer structure.” Jpn. J. Appl. Phys. 27(2): 1988. p. L269-L271.
C.W. Tang et al. “Electroluminescence of doped organic thin films.” J. Appl. Phys. 65(9): 1989. p. 3610-3616.
“New Aspect of Research and Development of Organic EL.” M&BE Seminar, Bulletin of Organic Molecular/Bioelectronics Subcommittee, Society of Applied Physics, 11(1): 2000. pp. 3-12.
T. Wakimoto et al. “Organic EL cells using alkaline metal compounds as electron injection materials.” IEEE Transactions on Electron Devices 44(8): 1997. pp. 1245-1248.
S.A. Van Slyke et al. “Organic electroluminescent devices with improved stability.” Appl. Phys. Lett. 69(15): 1996. pp. 2160-2162.
D.F. O'Brien et al. “Improved energy transfer in electrophosphorescent devices.” Appl. Phys. Lett. 74(3): 1999. pp. 442-444.
T. Tsutsui et al. “The operation mechanism and the light emission efficiency of the organic EL element.” Text of the Third Lecture Meeting, Bulletin of Organic Molecular/Bioelectronics Subcommittee, Society of Applied Physics, pp. 31-37.
J. Kido et al. “Multilayer white light-emitting organic electroluminescent device.” Science 267: 1995. pp. 1332-1334.
T. Tsutsui et al. “High quantum efficiency in organic light-emitting devices with iridium-complex as a triplet emissive center.” Jpn. J. Appl. Phys. 38: 1999. p. L1502-L1504.
Satoshi Seo et al., U.S. Appl. No. 10/043,786, filed Jan. 10, 2002.
Satoshi Seo et al., U.S. Appl. No. 10/043,812, filed Jan. 10, 2002.
Satoshi Seo et al., U.S. Appl. No. 10/060,427, filed Jan. 29, 2002.
Shunpei Yamazaki et al., U.S. Appl. No. 10/062,005, filed Jan. 31, 2002.
Shunpei Yamazaki et al., U.S. Appl. No. 10/072,310, filed Feb. 5, 2002.
Shunpei Yamazaki et al., U.S. Appl. No. 10/081,971, filed Feb. 20, 2002.
Satoshi Seo et al., U.S. Appl. No. 10/081,558, filed Feb. 20, 2002.
Hirokazu Yamagata et al., U.S. Appl. No. 09/852,090, filed May 10, 2001.
Satoshi Seo et al., U.S. Appl. No. 10/026,064, filed Dec. 21, 2001.
Satoshi Seo et al., U.S. Appl. No. 10/024,699, filed Dec. 21, 2001.
Invitation to Respond to Written Opinion w/International Search Report, 6 pages, Jun. 10, 2004.

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