Browsing by Author "Bradley, D. D. C."
Now showing items 1-13 of 13
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Article
4H-1,2,6-Thiadiazin-4-one-containing small molecule donors and additive effects on their performance in solution-processed organic solar cells
Hermerschmidt, F.; Kalogirou, Andreas S.; Min, J.; Zissimou, Georgia A.; Tuladhar, S. M.; Ameri, T.; Faber, H.; Itskos, Grigorios; Choulis, Stelios A.; Anthopoulos, T. D.; Bradley, D. D. C.; Nelson, J.; Brabec, C. J.; Koutentis, Panayiotis Andreas (2015)The optical, electrochemical, morphological and transport properties of a series of thiadiazinone (acceptor) and (thienyl)carbazoles (donor) containing π-extended donor-acceptor-donors (D-A-D) are presented. Systematic ...
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Article
Efficient dipole-dipole coupling of Mott-Wannier and Frenkel excitons in (Ga,In)N quantum well/polyfluorene semiconductor heterostructures
Itskos, Grigorios; Heliotis, G.; Lagoudakis, P. G.; Lupton, J.; Barradas, N. P.; Alves, E.; Pereira, S.; Watson, I. M.; Dawson, M. D.; Feldmann, J.; Murray, R.; Bradley, D. D. C. (2007)We investigate interactions between Mott-Wannier (MW) and Frenkel excitons in a family of hybrid structures consisting of thin organic (polyfluorene) films placed in close proximity (systematically adjusted by GaN cap layer ...
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Conference Object
Efficient förster transfer mediated by excitons in InGaN/GaN quantum well/polyfluorene heterostructures
Itskos, Grigorios; Heliotis, G.; Belton, C.; Watson, I. M.; Dawson, M. D.; Bradley, D. D. C.; Murray, R. (2007)We report on novel InGaN/GaN quantum well/polyfluorene heterostructures where efficient Förster energy transfer from the well to the organic layer occurs. We show that Mott-Wannier excitons dominate the quantum well ...
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Article
Erratum: Efficient dipole-dipole coupling of Mott-Wannier and Frenkel excitons in (Ga,In)N quantum well/polyfluorene semiconductor heterostructures (Physical Review B - Condensed Matter and Materials Physics (2007) 76, (035344))
Itskos, Grigorios; Heliotis, G.; Lagoudakis, P. G.; Lupton, J.; Barradas, N. P.; Alves, E.; Pereira, S.; Watson, I. M.; Dawson, M. D.; Feldmann, J.; Murray, R.; Bradley, D. D. C. (2008)
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Article
Hybrid inorganic/organic semiconductor heterostructures with efficient non-radiative energy transfer
Heliotis, G.; Itskos, Grigorios; Murray, R.; Dawson, M. D.; Watson, I. M.; Bradley, D. D. C. (2006)A hybrid inorganic/organic semiconductor structure employing a polyfluorene thin films with Efficient non-radiative Förster resonant energy transfer (FRET) was fabricated. FRET is mediated by dipole-dipole interactions, ...
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Article
Hybrid polaritons in strongly coupled microcavities: Experiments and models
Lidzey, D. G.; Wenus, J.; Whittaker, D. M.; Itskos, Grigorios; Stavrinou, P. N.; Bradley, D. D. C.; Murray, R. (2004)We describe the fabrication of one-dimensional quantum microcavities containing two different layers of molecular J-aggregates. We show that strong coupling can occur between the confined cavity photon mode and the two ...
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Article
Influence of surface-related states on the carrier dynamics in (Ga,In)N/GaN single quantum wells
Othonos, Andreas S.; Itskos, Grigorios; Bradley, D. D. C.; Dawson, M. D.; Watson, I. M. (2009)We report on the influence of surface-related states on the relaxation of carriers within single (Ga,In)N/GaN quantum wells. Two identical samples that differ only in the thickness of the top GaN cap layer were studied. ...
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Article
Low-threshold lasers based on a high-mobility semiconducting polymer
Heliotis, G.; Choulis, Stelios A.; Itskos, Grigorios; Xia, R.; Murray, R.; Stavrinou, P. N.; Bradley, D. D. C. (2006)Progress toward electrically driven conjugated polymer lasers should benefit from the identification of materials that exhibit good charge transport properties coupled with large optical gain. Here, we report a detailed ...
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Article
New light from hybrid inorganic-organic emitters
Belton, C. R.; Itskos, Grigorios; Heliotis, G.; Stavrinou, P. N.; Lagoudakis, P. G.; Lupton, J.; Pereira, S.; Gu, E.; Griffin, C.; Guilhabert, B.; Watson, I. M.; Mackintosh, A. R.; Pethrick, R. A.; Feldmann, J.; Murray, R.; Dawson, M. D.; Bradley, D. D. C. (2008)We present the highlights of a research programme on hybrid inorganic-organic light emitters. These devices combine recent developments in III-V nitride technology (including UV emitting micro-arrays and specifically ...
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Article
Novel BODIPY-based conjugated polymers donors for organic photovoltaic applications
Economopoulos, Solon P.; Chochos, Christos L.; Ioannidou, Heraklidia A.; Neophytou, Marios; Charilaou, C.; Zissimou, Georgia A.; Frost, J. M.; Sachetan, T.; Shahid, M.; Nelson, J.; Heeney, M.; Bradley, D. D. C.; Itskos, Grigorios; Koutentis, Panayiotis Andreas; Choulis, Stelios A. (2013)Five new polymers based on the 4,4'-difluoro-4-bora-3a,4a-diaza-s-indacene core (BODIPY) chromophore moiety have been synthesized as low bandgap polymers for optoelectronic applications. The polymers exhibited high solubility ...
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Article
Novel BODIPY-based conjugated polymers donors for organic photovoltaic applications
Economopoulos, Solon P.; Chochos, Christos L.; Ioannidou, Heraklidia A.; Neophytou, Marios; Charilaou, C.; Zissimou, Georgia A.; Frost, J. M.; Sachetan, T.; Shahid, M.; Nelson, J.; Heeney, M.; Bradley, D. D. C.; Itskos, Grigorios; Koutentis, Panayiotis Andreas; Choulis, Stelios A. (2013)Five new polymers based on the 4,4'-difluoro-4-bora-3a,4a-diaza-s-indacene core (BODIPY) chromophore moiety have been synthesized as low bandgap polymers for optoelectronic applications. The polymers exhibited high solubility ...
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Article
Photovoltaic limitations of BODIPY:fullerene based bulk heterojunction solar cells
Baran, D.; Tuladhar, S.; Economopoulos, Solon P.; Neophytou, Marios; Savva, Achilleas; Itskos, Grigorios; Othonos, Andreas S.; Bradley, D. D. C.; Brabec, C. J.; Nelson, J.; Choulis, Stelios A. (2017)The photovoltaic performance of blends of a series of 4,4′-Difluoro-4-bora-3a,4a-diaza-s-indacenes)-based (BODIPY) conjugated polymers donors with fullerene electron acceptors is investigated. Despite the high Voc values ...
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Article
White light emission via cascade Förster energy transfer in (Ga, In)N quantum well/polymer blend hybrid structures
Itskos, Grigorios; Belton, C. R.; Heliotis, G.; Watson, I. M.; Dawson, M. D.; Murray, R.; Bradley, D. D. C. (2009)We have studied the room-temperature non-radiative energy transfer processes in hybrid structures composed of (Ga, In)N/GaN single quantum wells and semiconducting polymer blend films placed in nanometre-scale proximity. ...