• 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  

      Analysis of the excited-state absorption spectral bandshape of oligofluorenes 

      Hayes, Sophia C.; Silva, C. (2010)
      We present ultrafast transient absorption spectra of two oligofluorene derivatives in dilute solution. These spectra display a photoinduced absorption band with clear vibronic structure, which we analyze rigorously using ...
    • Conference Object  

      Effect of molecular weight on the vibronic structure of a diketopyrrolopyrrole polymer 

      Hayes, Sophia C.; Pieridou, Galatia K.; Vezie, M.; Few, S.; Bronstein, H.; Meager, I.; McCulloch, I.; Nelson, J. (SPIE, 2016)
      Resonance Raman Spectroscopy (RRS) is employed in this study to examine the influence of molecular weight on the optical response of a diketopyrrolopyrrole polymer (DPP-TT-T) in solution. The vibronic structure observed ...
    • Article  

      Exploring the origin of high optical absorption in conjugated polymers 

      Vezie, M. S.; Few, S.; Meager, I.; Pieridou, Galatia K.; Dörling, B.; Ashraf, R. S.; Goñi, A. R.; Bronstein, H.; McCulloch, I.; Hayes, Sophia C.; Campoy-Quiles, M.; Nelson, J. (2016)
      The specific optical absorption of an organic semiconductor is critical to the performance of organic optoelectronic devices. For example, higher light-harvesting efficiency can lead to higher photocurrent in solar cells ...
    • 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  

      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 ...
    • 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 ...
    • Doctoral Thesis  Open Access

      Spectroscopic studies of molecular conformations of conjugated polymers for OPV applications 

      Lariou, Eirini S. (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2019-12)
      Τα οργανικά ηλεκτρονικά είναι ένας επιστημονικός κλάδος που προέκυψε ως μια ελκυστική εναλλακτική στην τεχνολογία πυριτίου λόγο του σημαντικά μειωμένου κόστους παραγωγής καθώς και κάποιων επιπλέον δυνατοτήτων που προσφέρουν ...
    • Article  

      Ultrafast carrier dynamics on conjugated poly(3-hexylthiophene)/[6,6]- phenyl C61 -butyric acid methyl ester composites 

      Lioudakis, Emmanouil E.; Othonos, Andreas S.; Alexandrou, Ioannis; Hayashi, Y. (2007)
      The authors have studied ultrafast carrier dynamics on poly(3- hexylthiophene)/[6,6]- phenyl C61 -butyric acid methyl ester (PCBM) composites up to 50% PCBM concentration. They have resolved the exciton intraband relaxation ...