Polyfluorenes diodes

M Radler, Progress in Dow Polyfluorenes for Light Emitting Diodes, 23rd Internaional Display Research Conference, September 15-18, 2003, Pointe South Mountain Resort, Phoenix, Arizona. 

X. Gong, P.K. Iyer, D. Moses, G.C. Bazan, A.J. Heeger, and S.S. Xiao, Stabilized blue emission from polyfluorene-based light-emitting diodes elimination of fluorenone defects, Adv. Funct. Mater., 13 325-329, 2003. 

T. Miteva, A. Meisel, W. Knoll, H.G. Nothofer, U. Scherf, D.C. Muller, K. Meerholz, A. Yasuda, and D. Neher, Improving the performance of polyfluorene-based organic light-emitting diodes via end-capping, Adv. Mater., 13 565-570, 2001. 

T. van Woudenbergh, J. Wildeman, P.W.M. Blom, J.J.A.M. Bastiaansen, and B.M.W. Langeveld-Voss, Electron-enhanced hole injection in blue polyfluorene-based polymer light-emitting diodes, Adv. Fund. Mater., 14 677-683, 2004. 

A.J. Campbell, D.D.C. Bradley, H. Antoniadis, M. Inbasekaran, W.W. Wu, and A.P. Woo, Transient and steady-state space-charge-limited currents in polyfluorene copolymer diode structures with ohmic hole injection contacts, Appl. Phys. Lett., 76 1734-1736, 2000. 

D. Neher, Control of color and efficiency of light-emitting diodes based on polyfluorenes blended with hole-transport molecules, Appl. Phys. Lett., 76 1810-1812, 2000. 

C. Ego, A.C. Grimsdale, F. Uckert, G. Yu, G. Srdanov, and K. Mullen, Triphenylamine-substi-tuted polyfluorene — a stable blue-emitter with improved charge injection for light-emitting diodes, Adv. Mater., 14 809-811, 2002. 

C. Shu, R. Dodda, F. Wu, M.S. Liu, and A.K. Jen, Highly efficient blue-light-emitting diodes from polyfluorene containing bipolar pendant groups, Macromolecules, 36 6698-6703, 2003. 

Q. Peng, M. Xie, Y. Huang, Z. Lu, and D. Xiao, New series of highly phenyl-substituted polyfluorene derivatives for polymer light-emitting diodes, J. Polym. ScL, Part A Polym. Chem., 42 2985-2993, 2004. 

X. Jiang, S. Liu, H. Ma, and A.K. Jen, High-performance blue light-emitting diode based on a binaphthyl-containing polyfluorene, Appl. Phys. Lett., 76 1813-1815, 2000. 

I. Levesque, A. Donat-Bouillud, Y. Tao, M. D lorio, S. Beaupre, P. Blondin, M. Ranger, J. Bouchard, and M. Leclerc, Organic tunable diodes from polyfluorene derivatives, Synth. Met., 122 79-81, 2001. 

C.I. Wilkinson, D.G. Lidzey, L.C. Palilis, R.B. Fletcher, S.J. Martin, X.H. Wang, and D.D.C. Bradley, Enhanced performance of pulse driven small area polyfluorene light emitting diodes, Appl. Phys. Lett., 79 171-173, 2001. 

A. Charas, J. Morgado, J.M.G. Martinho, A. Fedorov, L. Alcacer, and F. Cacialli, Excitation energy transfer and spatial exciton confinement in polyfluorene blends for application in light-emitting diodes, J. Mater. Chem., 12 3523-3527, 2002. 

X. Jiang, M.S. Liu, and A.K.-Y. Jen, Bright and efficient exciplex emission from light-emitting diodes based on hole-transporting amine derivatives and electron-transporting polyfluorenes, J. Appl. Phys., 91 10147-10152 (2002). 

X Gong, D Moses, AJ Heeger, and S Xiao, White light electrophosphorescence from polyfluorene-based light-emitting diodes utilization of fluorenone defects, J. Phys. Chem. B, 108 8601-8605,2004. 

J.S. Kim, R.H. Friend, and F. Cacialli, Improved operational stability of polyfluorene-based organic light-emitting diodes with plasma-treated indium-tin-oxide anodes, Appl. Phys. Lett., 74 3084-3086, 1999. 

Uckert [5,6] prepared electroactive poly(fluorene-co-fluroenone), (II), and aliphatic and perfluoroaliphatic derivatives for use in as light-emitting diodes. Light-emitting devices consisting of polyfluorene alkoxy derivatives, (III), were prepared by Mizuno [7],... 

Keywords Device performance Electron-transport moiety Hole-transport moiety Polyfluorenes Polymer light-emitting diode... 

Abstract Poly(dibenzosilole)s are an emerging class of polymers with similar optoelectronic properties to polyfluorenes. With increased stability towards oxidation, several poly(dibenzosilole)-based devices, such as light emitting diodes, have shown improved performance over their polyfluorene counterparts. As a consequence of reduced conjugation in the polymer chain, some poly(dibenzosilole)s have high triplet excited state energies, which make them suitable hosts for blue triplet emitters in electrophosphores-cent devices. 

Another way to introduce Ir(III) complexes into the main-chain of polyfluorenes was realized by Suzuki polycondensation of fluorene segments and /3-diketone ligand chelated with Ir(III) chloride-bridged dimmer (polymer 26 and 27) [34,35]. A saturated red-emitting polymer light-emitting diode was achieved from the device ITO/PEDOT/polymer 27 + PBD (40%)/Ba/Al with the maximum external quantum efficiency of 0.6% at the current density (J) of 38.5 mA/cm2 and the maximum luminance of 541 cd/m2 at 15.8 V. 

Keywords Chemical defects Electroluminescence Light-emitting diodes Photoluminescence Polyfluorene-type polymers... 

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