• 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 ...
    • Doctoral Thesis  Open Access

      Controlling electron and exciton transfer paths in molecular systems 

      Antoniou, Panayiotis F. (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2017-05)
      Η παρούσα Διδακτορική Διατριβή επικεντρώνεται στη μελέτη των μηχανισμών αντιδράσεων μεταφοράς ηλεκτρονίου (ΜΗΛ) και μεταφοράς ενέργειας (ΜΕΝ) σε μοριακά συστήματα. Ο κύριος στόχος της ερευνητικής μου δραστηριότητας ήταν ...
    • Article  

      Electron transfer contact maps 

      Skourtis, Spiros S.; Beratan, David N. (1997)
      An exact approach is introduced to establish and compare quantitative structure-function relationships in electron transfer proteins. The strategy is based on the idea of an electron transfer contact map and is motivated ...
    • 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  

      Fragment orbital based description of charge transfer in peptides including backbone orbitals 

      Heck, A.; Woiczikowski, P. B.; Kubař, T.; Welke, K.; Niehaus, T.; Giese, B.; Skourtis, Spiros S.; Elstner, M.; Steinbrecher, T. B. (2014)
      Charge transfer in peptides and proteins can occur on different pathways, depending on the energetic landscape as well as the coupling between the involved orbitals. Since details of the mechanism and pathways are difficult ...
    • 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  

      Modulating unimolecular charge transfer by exciting bridge vibrations 

      Lin, Z.; Lawrence, C. M.; Xiao, D.; Kireev, V. V.; Skourtis, Spiros S.; Sessler, J. L.; Beratan, David N.; Rubtsov, I. V. (2009)
      (Figure Presented) Ultrafast UV-vibrational spectroscopy was used to investigate how vibrational excitation of the bridge changes photoinduced electron transfer between donor (dimethylaniline) and acceptor (anthracene) ...
    • Article  

      Monitoring charge exchange in P3HT-nanotube composites using optical and electrical characterisation 

      Alexandrou, Ioannis; Lioudakis, Emmanouil E.; Delaportas, Dimitrios; Zhao, C. Z.; Othonos, Andreas S. (2009)
      Charge exchange at the bulk heterojunctions of composites made by mixing single wall nanotubes (SWNTs) and polymers show potential for use in optoelectronic devices such as solar cells and optical sensors. The density/total ...
    • 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, ...
    • 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  

      Structure inhomogeneities, shallow defects, and charge transport in the series of thermoelectric materials K2Bi8-xSb xSe13 

      Kyratsi, Theodora; Hatzikraniotis, E.; Paraskevopoulos, K. M.; Malliakas, C. D.; Dyck, J. S.; Uher, C.; Kanatzidis, M. G. (2006)
      The charge transport properties of the low-dimensional thermoelectric materials K2 Bi8-x Sbx Se13 (0<x≤8) were studied as a function of temperature and composition. The Seebeck coefficient shows an evolution from n - to p ...
    • Article  

      Topochemical transformations of substituted cyclopentanone transition metal adducts 

      Theocharis, Charis R. (2002)
      The application of chelation to transition metal ions as a means of controlling the packing motifs of substituted catechols and of substituted malonates has been studied. Substituted malonates have been shown to be capable ...
    • Article  

      Turning charge transfer on and off in a molecular interferometer with vibronic pathways 

      Xiao, D.; Skourtis, Spiros S.; Rubtsov, I. V.; Beratan, David N. (2009)
      Inelastic electron-transfer kinetics in molecules with electron donor and acceptor units connected by a bridge is expected to be sensitive to bridge-localized vibronic interactions. Here, we show how inelastic electron ...