Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – Active layer of indirect band gap semiconductor
Reexamination Certificate
2011-07-26
2011-07-26
Ho, Tu-Tu V (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
Active layer of indirect band gap semiconductor
C257S094000, C257S098000, C257SE33014
Reexamination Certificate
active
07985974
ABSTRACT:
An object is to provide a light-emitting element which exhibits light emission with high luminance and can be driven at low voltage. Another object is to provide a light-emitting device or an electronic device with reduced power consumption. Between an anode and a cathode, n (n is a natural number of two or more) EL layers are provided, where between a first EL layer and a second EL layer, a first layer containing any of an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth metal compound, and a rare earth metal compound, a second layer containing a material having a high electron-transporting property in contact with the first layer, and a region containing a material having a high hole-transporting property and an acceptor material in contact with the second layer are provided in this order from the anode side.
REFERENCES:
patent: 6013384 (2000-01-01), Kido et al.
patent: 7192659 (2007-03-01), Ricks et al.
patent: 7462883 (2008-12-01), Kumaki et al.
patent: 2003/0127967 (2003-07-01), Tsutsui et al.
patent: 2003/0189401 (2003-10-01), Kido et al.
patent: 2005/0098207 (2005-05-01), Matsumoto et al.
patent: 2007/0040161 (2007-02-01), Kumaki et al.
patent: 2007/0090376 (2007-04-01), Kumaki et al.
patent: 2007/0114512 (2007-05-01), Kumaki et al.
patent: 2007/0114527 (2007-05-01), Kumaki et al.
patent: 2007/0200125 (2007-08-01), Ikeda et al.
patent: 2008/0278064 (2008-11-01), Kumaki et al.
patent: 10-270171 (1998-10-01), None
patent: 2005-209643 (2005-08-01), None
patent: 3933591 (2007-06-01), None
patent: 01/15244 (2001-03-01), None
Nowatari et al., “Intermediate Connector with Suppressed Voltage Loss for White Tandem OLEDs,” Society for Information Display 2009 International Symposium Digest of Technical Papers Sessions 38-69 vol. XV, Book II, pp. 899-902, Jun. 4, 2009.
Matsumoto et al., “Multiphoton Organic EL device having Charge Generation Layer,” SID Digest '03: SID International Symposium Digest of Technical Papers, pp. 979-981 (2003).
Tsutsui et al., “Electric field-assisted bipolar charge spouting in organic thin-film diodes,” Appl. Phys. Lett., vol. 84, No. 3, pp. 440-442, Jan. 19, 2004.
Chang et al., “Highly efficient white organic electroluminescent devices based on tandem architecture,” Appl. Phys. Lett., 87, pp. 253501-1-253501-3 (2005).
Kanno et al., “White Stacked Electrophosphorescent Organic Light-Emitting Devices Employing MoO3as a Charge-Generation Layer,” Adv. Mater., 18, pp. 339-342 (2006).
Liao et al., “High-efficiency tandem organic light-emitting diodes,” Appl. Phys. Lett., vol. 84, No. 2, pp. 167-169, Jan. 12, 2004.
Terai et al., “Electric-field-assisted bipolar charge generation from internal charge separation zone composed of doped organic bilayer,” Appl. Phys. Lett., 90, pp. 083502-1-083502-3 (2007).
Law et al., “Effective organic-based connection unit for stacked organic light-emitting devices,” Appl. Phys. Lett., 89, pp. 133511-1-133511-3 (2006).
Leem et al., “Highly efficient tandemp-i-norganic light-emitting diodes adopting a low temperature evaporated rhenium oxide interconnecting layer,” Appl. Phys. Lett., 93, pp. 103304-1-103304-3 (2008).
Birnstock et al., “White Stacked OLED with 35 Im/W and 100,000 Hours Lifetime at 1000 cd/m2for Display and Lighting Applications,” SID Digest '08: SID International Symposium Digest of Technical Papers, pp. 822-825 (2008).
Lai et al., “Copper hexadecafluorophthalocyanine and copper phthalocyanine as a pure organic connecting unit in blue tandem organic light-emitting devices,” J. Appl. Phys., 101, pp. 014509-1-014509-4 (2007).
Kanno et al., “High Efficiency Stacked Organic Light-Emitting Diodes Employing Li2O as a Connecting Layer,” Jpn. J. Appl. Phys., vol. 45, No. 12, pp. 9219-9223 (2006).
Liao et al., “Power efficiency improvement in a tandem organic light-emitting diode,” Appl. Phys. Lett., 92, pp. 223311-1-223311-3 (2008).
Chan et al., “Influences of Connecting Unit Architecture on the Performance of Tandem Organic Light-Emitting Devices,” Adv. Funct. Mater., 17, pp. 2509-2514 (2007).
Ikeda et al., “Low-Drive-Voltage OLEDs with a Buffer Layer Having Molybdenum Oxide,” SID Digest, '06: SID International Symposium Digest of Technical Papers, pp. 923-926, (2006).
Hiramoto et al., “p-i-nlike behavior in three-layered organic solar cells having a co-deposited interlayer of pigments,” J. Appl. Phys., vol. 72, No. 8, pp. 3781-3787, Oct. 15, 1992.
Brabec et al., “Photovoltaic properties of conjugated polymer/methanofullerene composites embedded in a polystyrene matrix,” J. Appl. Phys., vol. 85, No. 9, pp. 6866-6872 (1999).
Nowatari Hiromi
Ohsawa Nobuharu
Seo Satoshi
Tsutsui Tetsuo
Ushikubo Takahiro
Erin J. Robinson, Robinson Intellectual Property Law Office, P.C
Ho Tu-Tu V
Semiconductor Energy Laboratory Co,. Ltd.
LandOfFree
Light-emitting element, light-emitting device, lighting... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light-emitting element, light-emitting device, lighting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light-emitting element, light-emitting device, lighting... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2727208