naa a22 4500 510734928 CHVBK 20180411083006.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s12039-013-0377-y doi (NATIONALLICENCE)springer-10.1007/s12039-013-0377-y Thiophene-based donor-acceptor conjugated polymer as potential optoelectronic and photonic material [Elektronische Daten] [MALUVADI MURALI, UDAYAKUMAR DALIMBA, VANDANA YADAV, RITU SRIVASTAVA, K SAFAKATH] In this paper, we report the synthesis, characterization and optical properties of a donor-acceptor conjugated polymer, PTh-CN, containing 3,4-didodecyloxythiophene and cyanovinylene units. The polymer possesses a low band gap of 1.75eV as calculated from the onset absorption edge. From the electrochemical study, the HOMO and LUMO energy levels of the polymer are figured out to be −5.52eV and −3.52eV, respectively. Polymer light-emitting diodes are fabricated using PTh-CN as the emissive layer with a device configuration of ITO/PEDOT:PSS/PTh-CN/Al. The device showed stable saturated red electroluminescence with CIE coordinate values (0.65, 0.32) at 12V, which are very close to the values for standard red demanded by the NTSC. In addition, the device showed good colour stability under different bias voltages and the threshold voltage of the PLED device is found to be as low as 3.1V. Further, a nanocomposite of the polymer and TiO2 nanoparticles is prepared by the dispersion method. The nonlinear optical properties of PTh-CN and PTh-CN/TiO 2 nanocomposite are studied using z-scan technique. The polymer solution, polymer film and polymer/TiO2 nanocomposite film show a strong saturable absorption behaviour. The value of saturation intensity (Is) is found to be of the order 1011-1012W/m2, indicating that the materials are useful candidates for photonic applications. Graphical Abstract Polymer light-emitting diodes (PLEDs) fabricated using a thiophene-based donor-acceptor conjugated polymer (PTh-CN) emitted pure red light with a lower threshold voltage. The polymer and the polymer/TiO2 nanocomposite films showed strong saturable absorption behaviour. Indian Academy of Sciences, 2013 Conjugated polymer nationallicence cyclic voltammetry nationallicence polymer light-emitting diode nationallicence nanocomposite nationallicence NLO, z-scan nationallicence MURALI MALUVADI Department of Chemistry, National Institute of Technology Karnataka, P.O Srinivasnagar 575 025, Surathkal, India aut DALIMBA UDAYAKUMAR Department of Chemistry, National Institute of Technology Karnataka, P.O Srinivasnagar 575 025, Surathkal, India aut YADAV VANDANA Organic Light-Emitting Diode Laboratory, Polymeric and Soft Material Division, National Physical Laboratory, 110 012, New Delhi, India aut SRIVASTAVA RITU Organic Light-Emitting Diode Laboratory, Polymeric and Soft Material Division, National Physical Laboratory, 110 012, New Delhi, India aut SAFAKATH K. Light and Matter Physics Group, Raman Research Institute, C V Raman Avenue, Bangalore 560 080, Sadashivanagar, India aut Journal of Chemical Sciences Springer-Verlag 125/2(2013-03-01), 247-257 0974-3626 125:2<247 2013 125 12039 https://doi.org/10.1007/s12039-013-0377-y text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12039-013-0377-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- MURALI MALUVADI Department of Chemistry, National Institute of Technology Karnataka, P.O Srinivasnagar 575 025, Surathkal, India aut NATIONALLICENCE 700 1- DALIMBA UDAYAKUMAR Department of Chemistry, National Institute of Technology Karnataka, P.O Srinivasnagar 575 025, Surathkal, India aut NATIONALLICENCE 700 1- YADAV VANDANA Organic Light-Emitting Diode Laboratory, Polymeric and Soft Material Division, National Physical Laboratory, 110 012, New Delhi, India aut NATIONALLICENCE 700 1- SRIVASTAVA RITU Organic Light-Emitting Diode Laboratory, Polymeric and Soft Material Division, National Physical Laboratory, 110 012, New Delhi, India aut NATIONALLICENCE 700 1- SAFAKATH K. Light and Matter Physics Group, Raman Research Institute, C V Raman Avenue, Bangalore 560 080, Sadashivanagar, India aut NATIONALLICENCE 773 0- Journal of Chemical Sciences Springer-Verlag 125/2(2013-03-01), 247-257 0974-3626 125:2<247 2013 125 12039 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer