Browsing by Author "Choulis, Stelios A."
Now showing items 1-19 of 19
-
Article
2-(2,3,4,5,6-Pentafluorophenyl)-1H-benzo[d]imidazole, a fluorine-rich building block for the preparation of conjugated polymer donors for organic solar cell applications
Neophytou, Marios; Ioannidou, Heraklidia A.; Ioannou, Theodosia A.; Chochos, Christos L.; Economopoulos, Solon P.; Koutentis, Panayiotis Andreas; Itskos, Grigorios; Choulis, Stelios A. (2012)We have introduced the pentafluorophenyl substituted benzimidazole as a building block of conjugated polymers for optoelectronic applications. We present the synthesis of a copolymer bearing fluorene as the comonomer. A ...
-
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 ...
-
Article
Concentration and excitation effects on the exciton dynamics of poly(3-hexylthiophene)/PbS quantum dot blend films
Tsokkou, Demetra; Itskos, Grigorios; Choulis, Stelios A.; Yarema, M.; Heiss, W.; Othonos, Andreas S. (2013)The dynamics of photoexcitations in hybrid blends of poly(3-hexylthiophene) (P3HT) conjugated polymer donor and oleic-acid capped lead sulfide (PbS) quantum dot (QD) acceptors of different concentrations - for light ...
-
Article
Electronic and interface properties of polyfluorene films on GaN for hybrid optoelectronic applications
Itskos, Grigorios; Xristodoulou, X.; Iliopoulos, Eleftherios; Ladas, Spyridon; Kennou, Styliani; Neophytou, Marios; Choulis, Stelios A. (2013)Electronic and interface properties of spin-coated poly(9,9- dioctylfluorenyl-2,7-diyl) (PFO) films on GaN have been investigated in terms of their potential for optoelectronic applications. The PFO/GaN interface was studied ...
-
Article
Excitation dynamics of a low bandgap silicon-bridged dithiophene copolymer and its composites with fullerenes
Othonos, Andreas S.; Itskos, Grigorios; Neophytou, Marios; Choulis, Stelios A. (2012)We report on excitation dynamics in pristine and bulk heterojunction films of the low bandgap silicon-bridged dithiophene copolymer poly[(4,4′-bis(2- ethylhexyl)dithieno[3,2-b:2′, 3′-d]silole)-2,6-diyl-alt-(4,7-bis(2- ...
-
Article
Förster resonant energy transfer from an inorganic quantum well to a molecular material: Unexplored aspects, losses, and implications to applications
Itskos, Grigorios; Othonos, Andreas S.; Choulis, Stelios A.; Iliopoulos, Eleftherios (2015)A systematic investigation of Förster resonant energy transfer (FRET) is reported within a hybrid prototype structure based on nitride single quantum well (SQW) donors and light emitting polymer acceptors. Self-consistent ...
-
Article
Identifying potential candidates for donor-acceptor copolymers on a series of 4H-1,2,6-thiadiazines: An electrochemical approach
Economopoulos, Solon P.; Koutentis, Panayiotis Andreas; Ioannidou, Heraklidia A.; Choulis, Stelios A. (2013)A series of synthesized small organic molecules based on the 4H-1,2,6-thiadiazine moiety are studied using electrochemistry, to probe their potential as comonomer building blocks for solar-absorbing polymers for organic ...
-
Article
Inkjet printing processing conditions for bulk-heterojunction solar cells using two high-performing conjugated polymer donors
Hermerschmidt, F.; Papagiorgis, Panagiotis; Savva, Achilleas; Christodoulou, Chris C.; Itskos, Grigorios; Choulis, Stelios A. (2014)We report the processing conditions for inkjet-printed active layers of organic photovoltaic (OPV) devices comprising bulk-heterojunction blends of the low bandgap conjugated polymer poly[(4,4′-bis(2-ethylhexyl)dithieno[3,2-b: ...
-
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 ...
-
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 ...
-
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 ...
-
Article
Optical properties of organic semiconductor blends with near-infrared quantum-dot sensitizers for light harvesting applications
Itskos, Grigorios; Othonos, Andreas S.; Rauch, T.; Tedde, S. F.; Hayden, O.; Kovalenko, M. V.; Heiss, W.; Choulis, Stelios A. (2011)We report an optical investigation of conjugated polymer (P3HT)/fullerene (PCBM) semiconductor blends sensitized by near-infrared absorbing quantum dots (PbS QDs). A systematic series of samples that include pristine, ...
-
Book Chapter
Overview of Polymer and Copolymer Materials for Organic Photovoltaics
Economopoulos, Solon P.; Itskos, Grigorios; Koutentis, Panayiotis Andreas; Choulis, Stelios A. (Wiley Blackwell, 2014)
-
Book Chapter
Overview of Polymer and Copolymer Materials for Organic Photovoltaics
Economopoulos, Solon P.; Itskos, Grigorios; Koutentis, Panayiotis Andreas; Choulis, Stelios A. (Wiley Blackwell, 2014)
-
Book Chapter
Overview of Polymer and Copolymer Materials for Organic PhotovoltaicsAAA
Economopoulos, Solon P.; Itskos, Grigorios; Koutentis, Panayiotis Andreas; Choulis, Stelios A. (Wiley Blackwell, 2014)
-
Article
Photophysics of PbS Quantum Dot Films Capped with Arsenic Sulfide Ligands
Tsokkou, Demetra; Papagiorgis, Paris; Protesescu, Loredana; Kovalenko, Maksym V.; Choulis, Stelios A.; Christofides, Constantinos; Itskos, Grigorios; Othonos, Andreas S. (2014)PbS quantum dots (QDs) of different sizes capped with short (NH4)(3)AsS3 inorganic ligands are produced via ligand exchange processes from oleate-capped PbS QDs. The solid-state photophysical properties of the control ...
-
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 ...
-
Article
Size-dependent charge transfer in blends of Pbs quantum dots with a low-gap silicon-bridged copolymer
Itskos, Grigorios; Papagiorgis, Panagiotis; Tsokkou, Demetra; Othonos, Andreas S.; Hermerschmidt, F.; Economopoulos, Solon P.; Yarema, M.; Heiss, W.; Choulis, Stelios A. (2013)The photophysics of bulk heterojunctions of a high-performance, low-gap silicon-bridged dithiophene polymer with oleic acid capped PbS quantum dots (QDs) are studied to assess the material potential for light harvesting ...
-
Article
Size‐Dependent Charge Transfer in Blends of PbS Quantum Dots with a Low‐Gap Silicon‐Bridged Copolymer
Itskos, Grigorios; Papagiorgis, Paris; Tsokkou, Demetra; Othonos, Andreas S.; Hermerschmidt, Felix; Economopoulos, Solon P.; Yarema, Maksym; Heiss, Wolfgang; Choulis, Stelios A. (2013)