- AutorIn
- Riccardo Di Pietro
- Tim ErdmannTechnische Universität Dresden, Center for Advancing Electronics Dresden, Germany
- Naixiang Wang
- Xuhai Liu
- David Gräfe
- Johannes Lenz
- Josef Brandt
- Daniel Kasemann
- Karl Leo
- Mahmoud Al-Hussein
- Kirill L. Gerasimov
- David Doblas
- Dimitri A. Ivanov
- Brigitte Voit
- Dieter Neher
- Anton Kiriy
- Titel
- The impact of molecular weight, air exposure and molecular doping on the charge transport properties and electronic defects in dithienyldiketopyrrolopyrrole- thieno[3,2-b]thiophene copolymers
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-362730
- Quellenangabe
- Journal of Materials Chemistry C : Materials for optical and electronic devices
Erscheinungsjahr: 2016
Jahrgang: 4
Heft: 46
Seiten: 10827-10838
E-ISSN: 2050-7534 - Erstveröffentlichung
- 2016
- Abstract (EN)
- We performed an in-depth study of high molecular weight poly[3,6-(dithiophene-2-yl)-2,5-di(2-octyldodecyl)-pyrrolo[3,4-c]pyrrole-1,4-dione-alt-thieno[3,2-b]thiophene] P(DPP2OD-TT) synthesized through the Stille coupling polycondensation in order to understand the correlation between molecular weight, processing conditions and charge transport. We observed a rapid increase in its aggregation in solution with increasing molecular weight which strongly limits the solubility and processability for weight average molecular weights beyond 200 kg mol⁻¹. This results in severe limitation in the charge transport properties of the polymer. We further observe the presence of bulk electronic defects in all different polymer batches that severely limit the current flow and manifest themselves in organic field effect transistors as apparent charge density dependence of the mobility. These defects are passivated by exposure to an ambient atmosphere, as confirmed by an increase in current and mobility that is no more charge density dependent. This is further confirmed by the result of chemical doping using 2,2-(perfluoronaphthalene-2,6-diylidene)dimalononitrile, F₆TCNNQ, which leads to the filling of the trap states and a higher charge density independent mobility of up to 1 cm2 V⁻¹ s⁻¹.
- Andere Ausgabe
- Link zum Artikel, der zuerst in der Zeitschrift 'Journal of Materials Chemistry C' erschienen ist.
DOI: 10.1039/c6tc03545k - Freie Schlagwörter (DE)
- Polykondensation, Molekulargewicht, Verarbeitung, Ladungstransport, chemisches Doping
- Freie Schlagwörter (EN)
- polycondensation, molecular weight, processing, charge transport, chemical doping
- Klassifikation (DDC)
- 540
- 620
- 530
- Verlag
- Royal Society of Chemistry, London
- Förder- / Projektangaben
- Deutsche Forschungsgemeinschaft (DFG)
Center for Advancing Electronics Dresden (cfaed)
ID: 194636624 - Ministry of Education and Science of the Russian Federation ID:  14.604.21.0121
- Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-362730
- Veröffentlichungsdatum Qucosa
- 10.01.2020
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis