Prof. Donal D. C. Bradley Profile

Prof. Donal D. C. Bradley

Professor at King Abdullah Univ of Science and Technology

SPIE Involvement:

Author

Publications (50)

Proceedings Article | 21 December 2022 Poster + Presentation + Paper

Light regulation of organic light-emitting diodes with conductive distributed Bragg reflectors

Yun Hu, Jing-song Huang, Paul Stavrinou, Donal D. C. Bradley

Proceedings Volume 12314, 123140O (2022) https://doi.org/10.1117/12.2641624

KEYWORDS: Organic light emitting diodes, Refractive index, Electroluminescence, Optoelectronic devices, Distributed Bragg reflectors

Read Abstract +

Proceedings Article | 9 October 2021 Presentation + Paper

Phenothiazine-benzimidazole based architecture as an efficient interfacial charge transport layer for perovskite blue light emitting diodes

Keval Sonigara, Hailong Wang, Jiang Chao, Zhiyuan Xie, Jian Fan, Jingsong Huang, Paul Stavrinou, Donal D. C. Bradley

Proceedings Volume 11894, 118940H (2021) https://doi.org/10.1117/12.2600917

KEYWORDS: Perovskite, Molecules, Glasses, Electrons, Electrodes, Blue light emitting diodes, Organic electric materials, Organic optoelectronics

Read Abstract +

Proceedings Article | 21 August 2009 Paper

Solution processed low-voltage organic transistors based on self-assembled monolayer gate dielectrics

James Ball, Paul Wöbkenberg, Florian Colléaux, Jeremy Smith, Donal D. Bradley, Thomas Anthopoulos

Proceedings Volume 7417, 741711 (2009) https://doi.org/10.1117/12.825339

KEYWORDS: Dielectrics, Self-assembled monolayers, Semiconductors, Field effect transistors, Aluminum, Transistors, Electrodes, Diodes, Molecules, Glasses

Read Abstract +

Proceedings Article | 16 April 2008 Paper

Blue-light-emitting polymer lasers with non-periodic circular Bragg resonators

Thomas Wellinger, Christof Pflumm, Jing Becker, Thomas Weimann, Mariano Campoy-Quiles, Paul Stavrinou, Ulrich Scherf, Donal Bradley

Proceedings Volume 6999, 699907 (2008) https://doi.org/10.1117/12.781033

KEYWORDS: Resonators, Polymers, Refractive index, Laser resonators, Laser damage threshold, Semiconductor lasers, Optical design, Optical pumping, Nd:YAG lasers, Modulation

Read Abstract +

Proceedings Article | 16 April 2008 Paper

Light-sensing ambipolar organic transistors for optoelectronic applications

Thomas Anthopoulos, Paul Wöbkenberg, Donal Bradley

Proceedings Volume 6999, 69990X (2008) https://doi.org/10.1117/12.780858

KEYWORDS: Transistors, Electro optics, Field effect transistors, Gold, Optoelectronics, Electrodes, Sensors, Switches, Optoelectronic devices, Light emitting diodes

Read Abstract +

SPIE Journal Paper | 1 March 2008

Blue polymer optical fiber amplifiers based on conjugated fluorene oligomers

Jenny Clark, Luca Bazzana, Donal Bradley, Juan Cabanillas-Gonzalez, Guglielmo Lanzani, David Lidzey, Jorge Morgado, Alessandro Nocivelli, Wing Tsoi, Tersilla Virgili, Ruidong Xia

JNP, Vol. 2, Issue 01, 023504, (March 2008) https://doi.org/10.1117/12.10.1117/1.2902341

KEYWORDS: Phase only filters, Polymethylmethacrylate, Signal attenuation, Absorption, Polymers, Optical fibers, Polymer optical fibers, Optical amplifiers, Waveguides, Molecules

Read Abstract +

Proceedings Article | 13 September 2007 Paper

Highly sensitive thin film polymer phototransistors

Xuhua Wang, Kamol Wasapinyokul, Wei Tan, Ruth Rawcliffe, Alasdair Campbell, Donal Bradley

Proceedings Volume 6658, 66581C (2007) https://doi.org/10.1117/12.735527

KEYWORDS: Transistors, Polymers, Annealing, Polymer thin films, Phototransistors, Thin films, Field effect transistors, Silicon, Photovoltaics, Electrons

Read Abstract +

Proceedings Article | 3 November 2006 Paper

TOF mobility measurements in pristine films of P3HT: control of hole injection and influence of film thickness

Amy Ballantyne, Joanne Wilson, Jenny Nelson, Donal Bradley, James Durrant, Martin Heeney, Warren Duffy, Iain McCulloch

Proceedings Volume 6334, 633408 (2006) https://doi.org/10.1117/12.680655

KEYWORDS: Polymers, Annealing, Polymer thin films, Thin films, Temperature metrology, Electrodes, Thin film devices, Aluminum, Measurement devices, Indium

Read Abstract +

Proceedings Article | 23 February 2006 Paper

Photolithographically patternable of electroluminescent liquid crystalline materials for full-colour organic light emitting displays

Andrew McGlashon, Katherine Whitehead, Donal Bradley, Martin Heeney, Iain McCulloch, Weimin Zhang, Alasdair Campbell

Proceedings Volume 6117, 61170S (2006) https://doi.org/10.1117/12.646426

KEYWORDS: Crystals, Liquid crystals, Absorbance, Organic light emitting diodes, Solids, Molecules, Liquids, Luminescence, Electroluminescence, Thin films

Read Abstract +

Proceedings Article | 19 January 2006 Paper

Organic light emitting diodes and photodetectors: Toward applications in lab-on-a-chip portable devices

Xuhua Wang, Oliver Hofmann, Jingsong Huang, Edward Barrett, Rupa Das, Andrew de Mello, John de Mello, Donal Bradley

Proceedings Volume 6036, 60361O (2006) https://doi.org/10.1117/12.638252

KEYWORDS: Organic light emitting diodes, Photodetectors, Polymers, Microfluidics, Fluorescence spectroscopy, Luminescence, Photodiodes, Signal detection, Light sources, Sensors

Read Abstract +

Proceedings Article | 8 October 2005 Paper

Semiconducting polymer optical amplifiers

M. Goosens, G. Heliotis, G. Turnbull, A. Ruseckas, J. Lawrence, R. Xia, D. D. Bradley, Ifor D. Samuel

Proceedings Volume 5937, 593706 (2005) https://doi.org/10.1117/12.624672

KEYWORDS: Optical amplifiers, Polymers, Semiconductors, Solid state electronics, Organic semiconductors, Absorption, Luminescence, Laser beam diagnostics, Optical semiconductors, Optical fibers

Read Abstract +

Proceedings Article | 8 October 2005 Paper

Modelling of the laser dynamics of electrically pumped organic semiconductor laser diodes

Christof Pflumm, Christian Karnutsch, René Boschert, Martina Gerken, Uli Lemmer, John deMello, Donal D.C. Bradley

Proceedings Volume 5937, 59370X (2005) https://doi.org/10.1117/12.616907

KEYWORDS: Excitons, Semiconductor lasers, Refractive index, Laser damage threshold, Waveguides, Absorption, Organic semiconductors, Electroluminescence, Electrons, Electrodes

Read Abstract +

Proceedings Article | 4 October 2005 Paper

Integrated sensors for point-of-care detection

O. Hofmann, X. Wang, J. Huang, S. Atkins, P. Sullivan, D. D.C. Bradley, A. DeMello, J. De Mello

Proceedings Volume 5938, 59380H (2005) https://doi.org/10.1117/12.626291

KEYWORDS: Microfluidics, Photodiodes, Polymers, Point-of-care devices, Sensors, Glasses, Silicon, Hydrogen, Laser induced damage, Positron emission tomography

Read Abstract +

Proceedings Article | 4 October 2005 Paper

The effect of zinc oxide nanostructure on the performance of hybrid polymer/zinc oxide solar cells

Ana Peiró, P. Ravirajan, K. Govender, D.S. Boyle, P. O'Brien, D.D.C. Bradley, J. Nelson, J. Durrant

Proceedings Volume 5938, 593819 (2005) https://doi.org/10.1117/12.617555

KEYWORDS: Zinc oxide, Polymers, Particles, Zinc, Oxides, Solar cells, Nanoparticles, Metals, Chlorine, Nanorods

Read Abstract +

Proceedings Article | 4 April 2005 Paper

26dB optical gain in a rib waveguide dye-doped polymer amplifier operating at 625 nm

Mark Reilly, Miguel Ramon, Claudio Marinelli, Christopher Morgan, Marilu Ariu, Ruidong Xia, Richard Penty, Ian White, Donal Bradley

Proceedings Volume 5724, (2005) https://doi.org/10.1117/12.590359

KEYWORDS: Waveguides, Polymers, Optical amplifiers, Polymer multimode waveguides, Signal to noise ratio, Polymethylmethacrylate, Absorption, Rhodamine, Silica, Polymer optical fibers

Read Abstract +

Proceedings Article | 10 November 2004 Paper

Thermodynamic constants for excimer formation and dissociation in oxidized poly(9,9-dioctylfluorene) (PFO)

Marc Sims, Aristidis Asimakis, Marilu Ariu, Donal Bradley

Proceedings Volume 5519, (2004) https://doi.org/10.1117/12.567753

KEYWORDS: Excimers, Excitons, Crystals, Luminescence, Chromophores, Absorption, Thin films, Polymers, Quantum efficiency, Oxidation

Read Abstract +

Proceedings Article | 10 November 2004 Paper

Electromodulation studies of a polyfluorene light-emitting diode

Paul Lane, Paul Brewer, Donal Bradley, Andrew de Mello, John de Mello

Proceedings Volume 5519, (2004) https://doi.org/10.1117/12.563257

KEYWORDS: Electrons, Light emitting diodes, Organic light emitting diodes, Polymers, Modulation, Electroluminescence, Electrodes, Absorption, Solids, LED displays

Read Abstract +

Proceedings Article | 10 November 2004 Paper

Comparative measurements of charge transport in semiconducting polymers and their devices

Ruth Rawcliffe, Donal Bradley, Alasdair Campbell

Proceedings Volume 5519, (2004) https://doi.org/10.1117/12.566927

KEYWORDS: Field effect transistors, Interfaces, Polymers, Temperature metrology, Semiconductors, Polarons, Solar energy, Photovoltaics, Crystals, Light emitting diodes

Read Abstract +

Proceedings Article | 3 November 2004 Paper

Efficient hybrid polymer/TiO2 solar cells using a multilayer structure

Punniamoorthy Ravirajan, Alex Green, Saif Haque, James Durrant, Donal Bradley, Jenny Nelson

Proceedings Volume 5520, (2004) https://doi.org/10.1117/12.561212

KEYWORDS: Polymers, Telescopic pixel displays, Excitons, Absorption, Diffusion, Electrodes, Luminescence, Gold, Solar cells, External quantum efficiency

Read Abstract +

Proceedings Article | 8 September 2004 Paper

Ultrafast photonics in doped polymer matrix

Tersilla Virgili, D. Marinotto, Guglielmo Lanzani, Donal Bradley

Proceedings Volume 5464, (2004) https://doi.org/10.1117/12.549293

KEYWORDS: Ultrafast phenomena, Photonics, Polymers, Polymethylmethacrylate, Absorption, Switching, Solid state physics, Laser beam diagnostics, Picosecond phenomena, Physics

Read Abstract +

Proceedings Article | 8 September 2004 Paper

Field screening effects in polymer light emitting diodes

Paul Brewer, Paul Lane, Donal Bradley, Andrew deMello, John deMello

Proceedings Volume 5464, (2004) https://doi.org/10.1117/12.546904

KEYWORDS: Electrons, Light emitting diodes, Organic light emitting diodes, Modulation, Electroluminescence, Polymers, Laser beam diagnostics, Semiconductors, Spectroscopes, Neodymium

Read Abstract +

Proceedings Article | 16 February 2004 Paper

Ohmic hole injection into a polyfluorene homopolymer

Dmitry Poplavskyy, Jenny Nelson, Donal Bradley

Proceedings Volume 5214, (2004) https://doi.org/10.1117/12.505521

KEYWORDS: Electroluminescence, Aluminum, Electrodes, Bismuth, Polymers, Organic light emitting diodes, Capacitance, Interfaces, Resistance, Modulation

Read Abstract +

Proceedings Article | 16 February 2004 Paper

Hole and electron transport in poly(9,9-dioctylfluorene) and poly(9,9-dioctylfluorene-co-benzothiadiazole)

Theo Kreouzis, Donal Bradley, Alasdair Campbell

Proceedings Volume 5214, (2004) https://doi.org/10.1117/12.506016

KEYWORDS: Electron transport, Polymers, Crystals, Temperature metrology, Liquid crystals, Polymer thin films, Light emitting diodes, Glasses, Physics, Gold

Read Abstract +

Proceedings Article | 16 February 2004 Paper

The interchain origin of the green emission band in oxidized poly(9,9-dioctylfluorene) (PFO)

Marc Sims, Marilu Ariu, Aristidis Asimakis, Mattijs Koeberg, Mathias Stouff, Mark Fox, Donal Bradley

Proceedings Volume 5214, (2004) https://doi.org/10.1117/12.506340

KEYWORDS: Excitons, Excimers, Absorption, Luminescence, Polymers, Picosecond phenomena, Absorbance, Energy transfer, FT-IR spectroscopy, Oxidation

Read Abstract +

Proceedings Article | 6 February 2004 Paper

Charge recombination studies in polyfluorene:[6,6]-phenyl c61-butyric acid methyl ester blend photovoltaic cells

Roberto Pacios, Jenny Nelson, James Durrant, Donal Bradley, Markus Westerling, Ronald Oesterbacka, Christoph Brabec

Proceedings Volume 5215, (2004) https://doi.org/10.1117/12.530719

KEYWORDS: Solar cells, Organic photovoltaics, Absorption

Read Abstract +

Proceedings Article | 6 February 2004 Paper

Solid state solar cell made from nanocrystalline TiO2 with a fluorene-thiophene copolymer as a hole conductor

Punniamoorthy Ravirajan, Saif Haque, Dmitry Poplavskyy, James Durrant, Donal Bradley, Jenny Nelson

Proceedings Volume 5215, (2004) https://doi.org/10.1117/12.506017

KEYWORDS: Polymers, Quantum efficiency, Absorption, Interfaces, Solar cells, Polymer thin films, Gold, Coating, Solid state electronics, Polarons

Read Abstract +

Proceedings Article | 17 November 2003 Paper

Comparison between bulk and field effect mobility in polyfluorene copolymer field effect transistors

Ruth Rawcliffe, Donal Bradley, Alasdair Campbell

Proceedings Volume 5217, (2003) https://doi.org/10.1117/12.506038

KEYWORDS: Field effect transistors, Polymers, Gold, Electrodes, Silicon, Glasses, Interfaces, Polymer thin films, Diodes, Organic light emitting diodes

Read Abstract +

Proceedings Article | 10 November 2003 Paper

Strong-coupled exciton and photon modes in conjugated-polymer-based microcavities

Noriyuki Takada, Toshihide Kamata, Donal Bradley

Proceedings Volume 5212, (2003) https://doi.org/10.1117/12.503455

KEYWORDS: Optical microcavities, Excitons, Polaritons, Reflection, Reflectivity, Dispersion, Polymers, Electroluminescence, Light emitting diodes, Refractive index

Read Abstract +

Proceedings Article | 27 August 2003 Paper

Optical and electrical studies of modified conjugated polymer films

Stephen Lipson, Ashley Cadby, Jonathan Coleman, Paul Lane, Anna Drury, Diarmuid O'Brien, Donal Bradley, Werner Blau

Proceedings Volume 4876, (2003) https://doi.org/10.1117/12.464074

KEYWORDS: Polymers, Polarons, Absorption, Luminescence, Thin films, Light emitting diodes, Polymer thin films, Electrons, Excitons, Dielectric spectroscopy

Read Abstract +

Proceedings Article | 27 February 2002 Paper

Balancing electron and hole currents in single layer poly(9,9-dioctylfluorene) light-emitting diodes

Alasdair Campbell, Homer Antoniadis, Tersilla Virgili, David Lidzey, Xuhua Wang, Donal Bradley

Proceedings Volume 4464, (2002) https://doi.org/10.1117/12.457478

KEYWORDS: Electron transport, Polymers, Organic light emitting diodes, Molecules, Light emitting diodes, Electroluminescence, Electrodes, Information operations, Quantum efficiency, Doping

Read Abstract +

Proceedings Article | 2 February 2001 Paper

High brightness and efficiency green light-emitting diodes based on fluorene-containing conjugated polymers and associated blends

Leonidas Palilis, Chris Wilkinson, David Lidzey, Donal Bradley, Michael Inbasekaran, Weishi Wu

Proceedings Volume 4105, (2001) https://doi.org/10.1117/12.416921

KEYWORDS: Light emitting diodes, Polymers, Quantum efficiency, Electroluminescence, Absorption, Luminescence, Excitons, External quantum efficiency, Calcium, Organic light emitting diodes

Read Abstract +

Proceedings Article | 2 February 2001 Paper

Absolute hole injection efficiency from pre-treated indium tin oxide electrodes into poly(9,9-dioctylflourene) and its copolymers

Alasdair Campbell, Donal Bradley, Homer Antoniadis

Proceedings Volume 4105, (2001) https://doi.org/10.1117/12.416896

KEYWORDS: Electrodes, Plasma, Polymers, Gold, Information operations, Organic light emitting diodes, Metals, Indium, Oxides, Light emitting diodes

Read Abstract +

Proceedings Article | 2 February 2001 Paper

Polarized electroluminescence from photocrosslinkable nematic fluorene bisacrylates

Markus Jandke, D. Hanft, Peter Strohriegl, Katharine Whitehead, Martin Grell, Donal Bradley

Proceedings Volume 4105, (2001) https://doi.org/10.1117/12.416913

KEYWORDS: Electroluminescence, Luminescence, Organic light emitting diodes, Absorption, Polarization, Chromophores, Photopolymerization, Dichroic materials, Liquid crystals, Polymers

Read Abstract +

Proceedings Article | 13 November 2000 Paper

Variation of the glass transition temperature in organic photorefractive materials: plasticizer versus novel synthetic approaches

Andre Leopold, Uwe Hofmann, M. Grasruck, Stephan Zilker, Dietrich Haarer, Jolita Ostrauskaite, Juozas Grazulevicius, Mukundan Thelakkat, Christoph Hohle, Peter Strohriegl, Hans-Werner Schmidt, Andreas Bacher, Donal Bradley, M. Redecker, Michael Inbasekaran, Weishi Wu, Edmund Woo

Proceedings Volume 4104, (2000) https://doi.org/10.1117/12.406472

KEYWORDS: Glasses, Chromophores, Molecules, Refractive index, Holography, Modulation, Polymers, Telescopic pixel displays, Photoresistors, Information operations

Read Abstract +

Proceedings Article | 19 May 2000 Paper

Studies of the internal electric field in organic light-emitting diodes and solar cells by electroabsorption spectroscopy

Paul Lane, Carsten Giebeler, S. Whitelegg, Simon Martin, Alasdair Campbell, Joern Rostalski, Dieter Meissner, Donal Bradley

Proceedings Volume 3939, (2000) https://doi.org/10.1117/12.386369

KEYWORDS: Light emitting diodes, Solar cells, Polymers, Interfaces, Electrodes, Organic light emitting diodes, Measurement devices, Organic photovoltaics, Solar energy, Absorption

Read Abstract +

Proceedings Article | 19 May 2000 Paper

Liquid crystalline orientation of polyfluorenes for polarized electroluminescence devices

Katharine Whitehead, Martin Grell, Donal Bradley, Markus Jandke, Peter Strohriegl

Proceedings Volume 3939, (2000) https://doi.org/10.1117/12.386372

KEYWORDS: Polymers, Electroluminescence, Absorption, Optical alignment, Liquids, Liquid crystals, Crystals, Luminescence, Polarization, Light emitting diodes

Read Abstract +

Proceedings Article | 17 December 1999 Paper

Transient studies of deep traps in electroluminescent polymers

Alasdair Campbell, Donal Bradley

Proceedings Volume 3797, (1999) https://doi.org/10.1117/12.372727

KEYWORDS: Capacitance, Polymers, Organic semiconductors, Interfaces, Light emitting diodes, Semiconductors, Molecules, Diodes, Sodium, Physics

Read Abstract +

Proceedings Article | 17 December 1999 Paper

Bright and efficient blue light-emitting diodes based on conjugated polymer blends

Leonidas Palilis, David Lidzey, Michael Redecker, Donal Bradley, Michael Inbasekaran, Edmund Woo, Weishi Wu

Proceedings Volume 3797, (1999) https://doi.org/10.1117/12.372734

KEYWORDS: Quantum efficiency, Polymers, Electroluminescence, Luminescence, Light emitting diodes, External quantum efficiency, Excitons, Blue light emitting diodes, Molecules, Metals

Read Abstract +

Proceedings Article | 16 December 1998 Paper

Conduction and trapping in electroluminescent polymer devices

Alasdair Campbell, Michael Weaver, David Lidzey, Donal Bradley, Ekkehard Werner, Wolfgang Bruetting, Markus Schwoerer

Proceedings Volume 3476, (1998) https://doi.org/10.1117/12.332603

KEYWORDS: Polymers, Gold, Modeling, Aluminum, Temperature metrology, Measurement devices, Spectroscopes, Capacitance, Organic light emitting diodes, Light emitting diodes

Read Abstract +

Proceedings Article | 16 December 1998 Paper

Charge injection from indium tin oxide into a starburst amine and its implications for organic light-emitting diodes

Homer Antoniadis, Carsten Giebeler, Donal Bradley, Yasuhiko Shirota

Proceedings Volume 3476, (1998) https://doi.org/10.1117/12.332607

KEYWORDS: Organic light emitting diodes, Telescopic pixel displays, Information operations, Glasses, Electron transport, Gold, Indium, Tin, Oxides, Interfaces

Read Abstract +

Proceedings Article | 4 December 1998 Paper

Effective stimulated emission and excited-state absorption cross-section spectra of luminescent polymers

Alfons Penzkofer, Wolfgang Holzer, S.-H. Gong, Donal Bradley, Xiao Long, Andreas Bleyer, Werner Blau, A. Davey

Proceedings Volume 3491, (1998) https://doi.org/10.1117/12.328623

KEYWORDS: Polymers, Absorption, Luminescence, Excitons, Resonators, Mirrors, Electrons, Picosecond phenomena, Chromophores, Lithium

Read Abstract +