2005-2009 Publications

2009

Phosphorescent light-emitting transistors: harvesting triplet excitons. E.B. Namdas, B.Y. Hsu, Z. H. Liu, S.C. Lo, P.L. Burn and I.D.W. Samuel. Adv. Mater. 21, 4957 (2009)

High triplet energy dendrons: enhancing the luminescence of deep blue phosphorescent iridium (III) complexes. S.C. Lo, R.E. Harding, C.P. Shipley, S.G. Stevenson, P.L. Burn and I.D.W. Samuel. Am. Chem. Soc. 131, 16681 (2009)

Semiconducting polymer waveguides for end-fired ultrafast optical amplifiers. N. Liu, A. Ruseckas, N.A. Montgomery, I.D.W. Samuel and G.A. Turnbull. Optics Express 17, 21452 (2009)

Probing the nanoscale phase separation in binary photovoltaic blends of poly(3-hexylthiophene) and methanofullerene by energy transfer. A. Ruseckas, P.E. Shaw and I.D.W. Samuel. Dalton Trans. 45, 10040 (2009)

Singlet energy transfer and singlet-singlet annihilation in light-emitting blends of organic semiconductors. A. Ruseckas, J.C. Ribierre, P.E. Shaw, S.V. Staton, P.L. Burn and I.D.W. Samuel. Appl. Phys. Lett. 95, 183305 (2009)

Effect of exciton self-trapping and molecular conformation on photophysical properties of oligofluorenes. S. Schumacher, A. Ruseckas, N.A. Montgomery, P.J. Skabara, A.L. Kanibolotsky, M.J. Paterson, I. Galbraith, G.A. Turnbull and I.D.W. Samuel. J. Chem. Phys. 131, 154906 (2009)

How to recognize lasing. I.D.W. Samuel, E.B. Namdas and G.A. Turnbull. Nature Photonics 3, 546 (2009)

Paramagnetic point defects and charge carriers in PbS and CdS nanocrystal polymer composites. D.J. Keeble, E.A. Thomsen, A. Stavrinadis, I.D.W. Samuel, J. M. Smith, and A.A.R. Watt. J. Phys. Chem. C 113, 17306 (2009)

The development of luminescent concentrators for pumping organic semiconductor lasers. Y. Yang, I.D.W. Samuel, G.A. Turnbull. Adv. Mater. 21, 3205 (2009)

Organic semiconductor optical amplifiers. D. Amarasinghe, A. Ruseckas, G.A. Turnbull and I.D.W. Samuel. Proc. IEEE 97, 1637 (2009)

Chemosensing of 1,4 dinitrobenzene using bisfluorene dendrimer distributed feedback lasers. S. Richardson, H.S. Barcena, G.A. Turnbull, P.L. Burn and I.D.W. Samuel. Appl. Phys. Lett. 95, 063305 (2009)

A study on the preparation and photophysical properties of an iridium(III) complexed homopolymer. W.Y. Lai, J.W. Levell, P.L. Burn, S.C. Lo, I.D.W. Samuel.  J. Mater. Chem. 19, 4952 (2009)

Effects of thermal annealing on the photophysical properties of bisfluorene-cored dendrimer films. J.C. Ribierre, A. Ruseckas, O.P.M. Gaudin, I.D.W. Samuel, H. Barcena, S.V. Staton and P.L. Burn. Org. Elec. 10, 803 (2009)

A two-photon pumped polyfluorene laser. G. Tsiminis, A. Ruseckas, I.D.W. Samuel and G.A. Turnbull. Appl. Phys. Lett. 94, 253304 (2009)

An open pilot study of ambulatory photodynamic therapy using a wearable low-irradiance organic light-emitting diode light source in the treatment of nonmelanoma skin cancer. S.K. Attili, A. Lesar, A. McNeill, M. Camacho-Lopez, H. Moseley, S. Ibbotson, I.D.W. Samuel and J. Ferguson. Brit. J. Derm161, 170 (2009)

Low-threshold organic laser based on an oligofluorenes truxene with low optical losses. G. Tsiminis, Y. Wang, P.E. Shaw, G. A. Turnbull, I.D.W. Samuel, I.F. Perepichka, M.M. Dawson, A.L. Kanibolotsky and P.J. Skabara. Appl. Phys. Lett. 94, 243304 (2009)

Synthesis and lanthanide-sensing behaviour of polyfluorene/1,10 phenanthroline copolymers. J. Ritchie, A. Ruseckas, P. Andre, C. Munther, M van Rysen, D.E. Vize, J.A. Crayston and I.D.W. Samuel. Synth. Met. 159, 583 (2009)

Effect of metal cathode reflectance on the exciton-dissociation efficiency in heterojunctions organic solar cells. A.K. Pandey, P.E. Shaw, I.D.W. Samuel and J.M. Nunzi. Appl. Phys. Lett. 94, 103303 (2009)

The development of phenylethylene dendrons for blue phosphorescent emitters. S.C. Lo, R.E. Harding, E. Brightman, P.L. Burn, and I.D.W. Samuel. Mater. Chem. 19, 3213 (2009)

Ultrafast intersystem crossing in a red phosphorescent iridium complex. G.J. Hedley, A. Ruseckas and I.D.W. Samuel. Phys. Chem. A 113, 2 (2009)

Control of charge transport in iridium (III) complex-cored carbazole dendrimers by generation and structural modification. S. Gambino, S.G. Stevenson, K.A. Knights, P.L. Burn and I.D.W. Samuel. Adv. Func. Mater. 19, 317 (2009)

High-gain broadband solid-state optical amplifier using a semiconducting copolymer. D. Amarasinghe, A. Ruseckas, A.E. Vasdekis, G.A. Turnbull and I.D.W. Samuel. Adv. Mater. 21, 107 (2009)

2008

 Thickness dependence of the fluorescence lifetime in films of bisfluorene-cored dendrimers. J.C. Ribierre, A. Ruseckas, P.E. Shaw, H.S. Barcena, P.L. Burn and I.D.W. Samuel. J Phys. Chem. C 112, 20463 (2008)

Exciton diffusion measurements in poly(3-hexylthiophene). P.E. Shaw, A. Ruseckas and I.D.W. Samuel. Adv. Mater. 20, 3516 (2008)

Distance dependence of excitation energy transfer between spacer separated conjugated polymer films P.E. Shaw, A. Ruseckas and I.D.W. Samuel. Phys. Rev. B 78, 245201(2008)

Influence of the dendron chemical structure on the photophysical properties of bisfluorene-cored dendrimers. J.C. Ribierre, A. Ruseckas, I.D.W. Samuel, H.S. Barcena and P.L. Burn. J.Chem. Phys. 128, 204703 (2008)

Hybrid dendritic molecules with confined chromophore architecture to tune fluorescence efficiency. P.Andre, G. Cheng, A. Ruseckas, T. Van Mourik, H. Fruchtl, J.A. Crayston, R.E. Morris, D. Cole-Hamilton and I.D.W. Samuel. J. Phys. Chem. B 112, 16382 (2008)

Iridium metal complexes as an unambiguous probe of intramolecular vibrational redistribution. G.J. Hedley, A. Ruseckas, Z.H. Liu, S.-C. Lo, P.L. Burn and I.D.W. Samuel. J. Am Chem. Soc. 130, 11842 (2008)

Quantitative analysis of multi-protein interactions using FRET: application to the SUMO pathway. S.F. Martin, M.H. Tatham, R.T. Hay and I.D.W. Samuel. Protein Science 17, 777 (2008)

Solution-processible phosphorescent blue dendrimers based n biphenyl-dendrons and fac-tris(phenyltriazolyl)iridium(III) cores. S.-C. Lo, R.N. Bera, R.E. Harding, P.L. Burn and I.D.W. Samuel. Adv. Func. Mater. 18, 1, (2008)

Hybrid optoelectronics: a polymer laser pumped by a nitride light-emitting diode. Y. Yang, G.A. Turnbull and I.D.W. Samuel. Appl. Phys. Lett. 92, 163306 (2008)

Photoinduced charge separation in poly(1,4-phenylenevinylene) derivatives studied by electron paramagnetc resonance. E.A. Thomsen, D.J. Keeble, B. Lochab, P.L. Burn, H. El-Mkami and I.D.W. Samuel. Organic Electronics 9, 809 (2008)

Triplet exciton diffusion and phosphorescence quenching in iridium(III)-centered dendrimers. J.C. Ribierre, A. Ruseckas, K. Knights, S.V. Staton, N. Cumpstey, P.L. Burn and I.D.W. Samuel. Phys. Rev. Lett. 100, 017402 (2008)

Two-photon absorption and lasing in first generation bisfluorene dendrimers. G. Tsiminis, J.C. Ribierre, A. Ruseckas, H.S. Barcena, G.J. Richards, G.A. Turnbull, P.L. Burn and I.D.W. Samuel. Adv. Mater. 20, 1940 (2008)

A rapid route to carbazole containing dendrons and phosphorescent dendrimers. K.A. Knights, S.G. Stevenson, C. P. Shipley, S.C. Lo, S. Olsen, R.E. Harding, S. Gambino, P.L. Burn and I.D.W. Samuel.  J. Mater. Chem. 18, 2121 (2008)

Picosecond gain switching of an organic semiconductor optical amplifier. D. Amarasinghe, A. Ruseckas, A.E. Vasdekis, G.A. Turnbull and I.D.W. Samuel. Appl. Phys. Lett. 92, 083305 (2008)

Electric field and temperature dependence of the hole mobility in a bis-fluorene cored dendrimer. S. Gambino, I.D.W. Samuel, H. Barcena and P.L. Burn. Organic Electronics 9, 220 (2008)

Ultrafast luminescence in Ir(ppy)3 G.J. Hedley, A. Ruseckas and I.D.W. Samuel. Chem. Phys. Lett. 450, 292 (2008)

Non-radiative decay mechanisms in blue phosphorescent iridium(III) complexes. R.E. Harding, S.C. Lo, P.L. Burn and I.D.W. Samuel. Org. Elec. 9, 377 (2008)

2007

Wavelength conversion from silica to polymer optical fibre communication wavelengths via ultrafast optical gain switching in a distributed feedback polymer laser. R. Xia, Ca. Cheung, A. Ruseckas, D. Amarasinghe, I.D.W. Samuel, and D.D.C. Bradley. Adv. Mater. 19, 4054 (2007)

Improved operational lifetime of semiconducting polymer lasers by encapsulation. S. Richardson, O.P.M. Gaudin, G.A. Turnbull and I.D.W. Samuel.Appl. Phys. Lett. 91, 261104 (2007)

Amplified spontaneous emission and lasing properties of bisfluorene-cored dendrimers. J.C. Ribierre, G. Tsiminis, S. Richardson, G.A. Turnbull, I.D.W. Samuel, H.S. Barcena and P.L. Burn. Appl. Phys. Lett. 91, 081108 (2007)

Effect of generation and soft lithography on semiconducting dendrimer lasers. J.R. Lawrence, E.B. Namdas, G.J. Richards, P.L. Burn and I.D.W. Samuel. Adv. Mater. 19, 3000 (2007)

The development of light-emitting dendrimers for displays. P.L. Burn, S.-C. Lo and I.D.W. Samuel. Adv. Mater. 19, 1675 (2007)

Electronically asymmetric poly(1,4-phenylenevinylene)s for photovoltaic cells. B. Lochab, P.L. Burn, A. Barkhouse, K.R. Kirov, H.E. Assender, D.J. Keeble, E.A. Thomsen, A.J. Lewis and I.D.W. Samuel. Organic Electronics 8, 801 (2007)

Solution processable phosphorescent rhenium(I) dendrimers. Y-J. Pu, R.E. Harding, S.G. Stevenson, E.B. Namdas, C. Tedeschi, J.P.J. Markham, R.J. Rummings, P.L. Burn and I.D.W. Samuel. Mater. Chem. 17, 4255 (2007)

Light fantastic. I.D.W. Samuel. Materials World  15(8) 28, 2007

Silicon based organic semiconductor laser. A.E. Vasdekis, S.A. Moore A. Ruseckas, T.F. Krauss, I.D.W. Samuel and G.A. Turnbull. Appl. Phys. Lett. 91, 051124

Amplification of optical pulse sequences at a high repetition rate in a polymer slab. D. Amarasinghe, A. Ruseckas, A.E. Vasdekis, G.A. Turnbull and IDW. Samuel. Appl. Phys. Lett. 91, 011105 (2007) and 92, 149902 (2008)

Optimization of the luminescence efficiencies in solution-processed phosphorescent dendrimers. J.C. Ribierre, S.G. Stevenson, I.D.W. Samuel, S.V. Staton and P.L. Burn. IEEE J. Display Technology 3, 233 (2007)

Highly branched phosphorescent dendrimers for efficient solution-processed organic light-emitting diodes. R.N. Bera, N. Cumpstey, P.L. Burn and I.D.W. Samuel. Advanced Functional Materials 17, 1149 (2007)

Organic semiconductor lasers. I.D.W. Samuel and G.A. Turnbull. Chemical Reviews 107, 1272 (2007)

Fluidic fibre dye lasers. A.E. Vasdekis, G.E. Town, G.A. Turnbull and I.D.W. Samuel. Optics Express 15, 3962 (2007)

Fluorescence spectroscopy of an in vitro model of human cervical precancer identifies neoplastic phenotype. S.F. Martin, A.D. Wood, M.M. McRobbie, M. Mazilu, M.P. McDonald, I.D.W. Samuel and C.S. Herrington. International Journal of Cancer 120, 1964 (2007)

A fluorescence-resonance-energy-transfer-based protease activity assay and its use to monitor paralog-specific small ubiquitin-like modifier processing. S.F. Martin, N. Hattersley, I.D.W. Samuel, R.T. Hay and M.H. Tatham. Analytical Biochemistry 363, 83 (2007)

2006

Ambulatory PDT: A new concept in delivering photodynamic therapy. H. Moseley, J.W. Allen, S. Ibbotson, A. Lesar, A. McNeill, M.A. Camacho-Lopez, I.D.W. Samuel, W. Sibbett and J. Ferguson. British Journal of Dermatology 154, 747 (2006)

Ambulatory PDT: Preliminary results. H. Moseley, J.W. Allen, I.D.W. Samuel, W. Sibbett and J. Ferguson. Lasers in Surgery and Medicine 29, 88 suppl 18 (2006)

Singlet exciton diffusion in MEH-PPV films studied by exciton-exciton annihilation. A.J. Lewis, A. Ruseckas, O.P.M. Gaudin, G.R. Webster, P.L. Burn and I.D.W. Samuel. Organic Electronics 7, 452 (2006)

Broadband solid state optical amplifier based on a semiconducting polymer. D. Amarasinghe, A. Ruseckas, A.E. Vasdekis, M. Goossens, G.A. Turnbull and I.D.W. Samuel. Appl. Phys. Lett. 89, 201119 (2006)

Blue phosphorescence from iridium(III) complexes at room temperature. S.C. Lo, C.P. Shipley, R.N. Bera, R.E. Harding, A.R. Cowley, P.L. Burn and I.D.W. Samuel. Chemistry of Materials 18, 5119 (2006)

Diode pumped distributed Bragg reflector lasers based on a dye-to-polymer energy transfer blend. A.E. Vasdekis, G. Tsiminis, J.-C. Ribierre, L. O’Faolain, T.F. Krauss, G.A. Turnbull and I.D.W. Samuel. Optics Express 14, 9211 (2006)

The equilibration of intrachain and interchain excitations in aggregates of a cyano-substituted phenylene vinylene polymer. P.F. Miller, M.M. de Souza, S.C. Moratti, A.B. Holmes, I.D.W. Samuel and G. Rumbles. Polymer International 55, 784 (2006)

The pH-dependent conformational transition of b-lactoglobulin modulates the binding of protoporphyrin IX. F. Tian, K. Johnson, A. Lesar, H. Moseley, J. Ferguson, I.D.W. Samuel, A. Mazzini and L. Brancaleon. Biochemica and Biophysica Acta 1760, 38 (2006)

The synthesis and properties of iridium cored dendrimers with carbazole dendrons. S.-C. Lo, E.B. Namdas, C. Shipley, J.P.J. Markham, T.D. Anthopoulos, P.L. Burn and I.D.W. Samuel. Organic Electronics 7, 85 (2006)

Effect of meta-linkages on the photoluminescence and electroluminescence properties of light-emitting polyfluorene alternating copolymers. J. Richie, J.A. Crayston, J.P.J. Markham and I.D.W. Samuel. J. Mater. Chem. 16, 1651 (2006)

Surface Plasmon-polariton mediated emission from phosphorescent dendrimer light-emitting diodes. C.J. Yates, I.D.W. Samuel, P.L. Burn and W.L. Barnes. Appl. Phys. Lett. 88, 161105 (2006)

2005

Effect of gain localisation in circular-grating distributed feedback lasers. G.A. Turnbull, A. Carleton, A. Tahraouhi, T.F. Krauss, I.D.W. Samuel, G.F. Barlow and K.A. Shore. Appl. Phys. Lett. 87, 201101 (2005); Virtual journal of Ultrafast Science Dec 2005

Ultrafast depolarisation of the fluorescence in a conjugated polymer. A. Ruseckas, P. Wood, I.D.W. Samuel, G.R. Webster, W.J. Mitchell, P.L. Burn and V. Sundström. Phys. Rev. B 72, 115214 (2005)

Investigating the effect of steric crowding in phosphorescent dendrimers. N. Cumpstey, R.N. Bera, P.L. Burn and I.D.W. Samuel. Macromolecules 38, 9564 (2005)

A light-blue phosphorescent dendrimer for efficient solution-processed light-emitting diodes. S.-C. Lo, G.J. Richards, J.P.J. Markham, E.B. Namdas, S. Sharma, P.L. Burn and I.D.W. Samuel. Adv. Func. Mater. 15, 1451 (2005)

Discrete hopping model of exciton transport in disordered media. V.M. Burlakov, K. Kawata, H.E. Assender, G.A.D. Brigss, A. Ruseckas and I.D.W. Samuel. Phys. Rev. B 72, 075206 (2005)

Influence of grating characteristics on the operation of circular-grating distributed-feedback polymer lasers. G.A. Turnbull, A. Carleton, G.F. Barlow, A. Tahraouhi, T.F. Krauss, K.A. Shore and I.D.W. Samuel. J. Appl. Phys. 98, 232105 (2005)

Encapsulated cores: host-free organic light-emitting diodes based on solution-processible electrophosphorescent dendrimers. S.-C. Lo, T.D. Anthopoulos, E.B. Namdas, P.L. Burn and I.D.W. Samuel. Adv. Mater. 17, 1945 (2005)

Light out-coupling efficiencies of organic light-emitting diode structures and the effect of photoluminescence quantum yield. L.H. Smith, J.A.E. Wasey, I.D.W. Samuel and W.L. Barnes. Adv. Func. Mater. 15, 1839 (2005)

Simple color tuning of phosphorescent dendrimer light-emitting diodes. E.B. Namdas, T.D. Anthopoulos, I.D.W. Samuel, M.J. Frampton, S.-C. Lo and P.L. Burn. Appl. Phys. Lett. 86, 161104 (2005)

Triplet exciton diffusion in fac-tris(2-phenylpyridine) iridium(III)-cored electroluminescent dendrimers. E.B. Namdas, A. Ruseckas, I.D.W. Samuel, S.-C. Lo and P.L. Burn. Appl. Phys. Lett. 86, 091104 (2005)

Low threshold edge-emitting polymer distributed feedback laser based on a square lattice. A.E. Vasdekis, G.A. Turnbull, I.D.W. Samuel, P. Andrew and W.L. Barnes. Appl. Phys. Lett. 86, 161102 (2005)

Description of exciton transport in a TiO2/MEH-PPV heterojunction photovoltaic material. K. Kawata, V.M. Burlakov, M.J. Carey, H.E. Assender, G.A.D. Briggs, A. Ruseckas and I.D.W Samuel. Solar Energy Materials and Solar Cells 87, 715 (2005)