Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2005-11-29
2005-11-29
Harvey, Minsun Oh (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S039000, C372S043010, C372S044010, C372S045013, C372S046012, C372S049010, C372S049010, C372S049010, C372S050121, C257S087000, C257S089000, C257S090000, C257S096000, C257S098000, C257S100000, C257S103000, C257S184000, C257S040000, C257S013000, C313S501000, C313S503000, C313S506000, C313S507000
Reexamination Certificate
active
06970490
ABSTRACT:
When the density of excitons in an organic single crystal (including the linear acenes, polyacenes, and thiophenes) approaches the density of molecular sites, an electron-hole plasma may form in the material altering the overall excitonic character of the system. The formation of the electron-hole plasma arises as a result of the screening of Coulomb interactions within individual excitons by injected free carriers. The large exciton densities required to accomplish this screening process can only be realized when excitons collect near dislocations, defects, traps, or are confined in heterostructures. Such confinement and subsequently large exciton densities allows for the observation of physical phenomena not generally accessible in an organic material. Specifically, the formation of an electron-hole plasma in an organic single crystal can allow for the observation of field-effect transistor action and electrically-pumped lasing. Amorphous organic materials and polymeric organic materials can also used to sustain an electron-hole plasma and demonstrate similar phenomena as well.
REFERENCES:
patent: 3816196 (1974-06-01), La Combe
patent: 3816198 (1974-06-01), La Combe et al.
patent: 5371817 (1994-12-01), Revelli et al.
patent: 5580523 (1996-12-01), Bard
patent: 5881089 (1999-03-01), Berggren et al.
patent: 6097147 (2000-08-01), Baldo et al.
patent: 6124964 (2000-09-01), Imanishi et al.
patent: 6300612 (2001-10-01), Yu
patent: 6316786 (2001-11-01), Mueller et al.
patent: 6363096 (2002-03-01), Dodabalapur et al.
patent: 6377597 (2002-04-01), Okumura
patent: 6515314 (2003-02-01), Duggal et al.
patent: 6610455 (2003-08-01), Burberry et al.
Adachi, C., et al., “Nearly 100% internal phosphorescence efficiency in an organic light emitting device,”J. of Applied Physics,2001, 90(10), 5048-5051.
Baldo, M.A., et al., “High-efficiency fluorescent organic light-emitting devices using a phosphorescent sensitier,”Nature,2000, 403, 750-753.
Baldo, M., et al., “Organic vapor phase deposition,”Adv. Mater.,1998, 10(18), 1505-1514.
Baldo, M.A., et al., “Excitonic singlet-triplet ratio in a semiconducting organic thin film,”Am. Phys. Soc.,1999, 60(20), 14 422-14 428.
Baldo, M.A., et al., “Transient analysis of organic electrophosphorescence. II. Transient analysis of triplet-triplet-triplet annihilation,”Am. Phys. Soc.,2000, 62(16), 10 967-10 977.
Baldo, M.A., et al., “Interface-limited injection in amorphous organic semiconductors,”Am. Phys. Soc.,2001, 64, 085201-1-085201-17.
Berggren, M., et al., “Light amplification in organic thin films using cascade energy transfer,”Nature,1997, 389, 466-469.
Bjorkholm, J.E., et al., “cw Self-focusing and self-trapping of light in sodium vapor,”Physical Review Letts.,1974, 32(4), 129-134.
Brouwer, H.J., et al., “Blue superradiance from neat semiconducting alternating copolymer films,”Adv. Mater.,1996, 8(11), 935-937.
Bulović, V., et al., “Weak microcavity effects in organic light-emitting devices,”Am. Phys. Soc.,1998, 58(7), 3730-3740.
Burland, D.M., “Cyclotron resonance in a molecular crystal-anthracene,”Phys. Rev. Letts.,1974, 33(14), 833-835.
Burland, D.M., et al., “Cyclotron resonance and carrier scattering processes in anthracene crystals,”J. of Chem. Physics,1977, 67(1), 319-331.
Burrows, P.E., et al., “Relationship between electroluminescence and current transport in organic heterojuction light-emitting devices,”J. Appl. Phys.,1996, 79(10), 7991-8006.
Campillo, A.J., et al., “Exciton interactions in crystalline tetracene studies by single picosecond pulse excitation,”Chem. Phys. Letts.,1977, 48(3), 495-500.
Chance, R.R., et al., “Molecular fluorescence and energy transfer near interfaces,”Adv. Chem. Phys.,1978, 1, 1-65.
Chen, B., et al., “Measurement of electron/hole mobility in organic/polymeric thin films using modified time-of-flight apparatus,”Synthetic Metals,1997, 91, 169-171.
D'Andrade, B.W., et al., “High-efficiency yellow double-doped organic light-emitting devices based on phosphor-sensitized fluorescence,”Appl. Phys. Letts.,2001, 79(7), 1045-1047.
Forrest, S.R., “Ultrathin organic films grown by organic molecular beam disposition and related techniques,”Chem. Rev.,1997, 97, 1793-1896.
Förster, T., “Energy transfer with special reference to biological systems,” Discussions of the Faraday Society,The Faraday Society,1959, 27, 1-6.
Frolov, S.V., et al.,“Transiet spectroscopy of tetracene single crystals,”Chem. Phys. Letts.,2001, 334, 65-68.
Frolov, S.V., et al., “Mirrorless lasing in conducting polymer poly(2,5-dioctyloxy-p-phenylenevinylene) films,”Jpn. J. Appl. Phys.,1996, vol. 35, Part 2, No. 10B, L 1371-L1373.
Hide, F., et al., “Semiconducting polymers: a new class of solid-state laser materials,”Science,1996, 273(5283), 1833-1836, http://www.sciencemag.org., 9 pages.
Hill, I.G., et al., “Organic semiconductor heterointerfaces containing bathocuproine,”J. Appl. Phys.,1999, 86(8), 4515-4519.
Hill, I.G., et al., “Charge-separation energy in films of II-conjugated organic molecules,”Chem. Phys. Letts.,2000, 327, 181-188.
Ishii, H., et al., “Energy level alignment and interfacial electronic structures at organic/metal and organic/organic interfaces,”Adv. Mater.,1999, 11(8), 605-625.
Kalinowski, J., et al., “Kinetics of charge carrier recombination in organic light-emitting diodes,”Appl. Phys. Letts.,1998, 72(5), 513-515.
Kozlov, V.G., et al., “Study of lasing action based on Förster energy transfer in optically pumped organic semiconductor thin films,”J. of Appl. Phys.,1998, 84(8), 4096-4108.
Kozlov, V.G., et al., “Optical properties of molecular organic semiconductor thin films under intense electrical excitation,”Appl. Phys. Letts.,1999, 74(8), 1057-1059.
O'Brien, D.F., et al., “Improved energy transfer in electrophosphorescent devices,”Appl. Phys. Letts.,1999, 74(3), 442-444.
Pinner, D.J., et al., “Moving the recombination zone in two layer polymer LEDs using high voltage pulses,”Synthetic Metals,1999, 1108-1109.
Schön, J.H., et al., “Fractional quantum hall effect in organic molecular semiconductors,”Science,2000, 288, 2338-2340.
Schön, J.H., et al., “An organic solid state injection laser,”Science,2000, 289, 599-601.
Shtein, M., et al., “Material transport regimes and mechanisms for growth of molecular organic thin films using low-pressure organic vapor phase deposition,”J. of Appl. Sci.,2001, 89(2), 1470-1476.
Sokolik, I., et al., “Biomolecular reactions of singlet excitons in tris(8-hydroxyquinoline) aluminum,”Appl. Phys. Lett.,1996, 69(27), 4168-4170.
Stampor, W., et al., “Electric field effect on luminescence efficiency in 8-hydroxyquinoline aluminum (Alq3) thin films,”Appl. Phys. Lett.,1997, 70(15), 1935-1937.
Tang, C.W., “Organic electroluminescent diodes,”Appl. Phys. Lett.,1987, 51(12), 913-915.
Tessler, N., et al., “Properties of light emitting organic materials within the context of future electrically pumped lasers,”Synthetic Metals,2000, 115, 57-62.
Tessler, N., et al., “High peak brightness polymer light-emitting diodes,”Adv. Mater.,1998, 10(1), 64-68.
Tessler, N., et al., “Lasting from conjugated-polymer microcavities,”Nature,1996, 382, 695-697.
Tokito, S., et al., “High-temperature operation of an electroluminescent device fabricated using a novel triphenylamine derivative,”Appl. Phys. Lett.,1996, 69(7), 878-915.
Tokito, S., et al., “Temperature dependences of electroluminescent characteristics in the devices fabricated with novel triphenylamine derivatives,”IEEE Trans. On Electron Devices,1997, 44(8), 1239-1244.
Tsutsui, T., et al., &#
Baldo Marc A.
Forrest Stephen R.
Holmes Russell James Delmar
FLores Ruiz Delma R.
Harvey Minsun Oh
Kenyon & Kenyon
The Trustees of Princeton University
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