Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.

Issue 3, 2017
Previous Article Next Article

Ambipolar charge distribution in donor–acceptor polymer field-effect transistors

Author affiliations


Recent developments in the design and synthesis of donor–acceptor semiconducting copolymers have significantly contributed to improve the ambipolar transport properties of polymer field-effect transistors (FETs). The further development of such FETs towards real applications would greatly benefit from the knowledge of the specific charge distribution along the channel, especially in the ambipolar regime. Here we accomplish this task by adopting charge modulation spectroscopy (CMS) and microscopy (CMM), electro-optical spectroscopy techniques which allow us to probe in situ charge induced features in the transmission spectra of conjugated polymers, to study a model high mobility donor–acceptor co-polymer (DPPT-TT, poly(N-alkyldiketopyrrolo-pyrrole dithienylthieno[3,2-b]thiophene)). Thanks to the sub-micrometer spatial resolution of confocal microscopy, we are able to isolate the specific contribution of channel and electrode regions which are superimposed in the macroscopic CMS spectra, thus allowing the mapping of hole and electron distributions across the active channel in both unipolar and ambipolar operating regimes. Our findings illustrate the use of a local probe in charge-modulation experiments to correctly assign spectral features and to determine the distributions of positive and negative charge carriers in an operating device, which has relevant implications on the understanding of the nature of charge transport in high-mobility ambipolar semiconducting polymers.

Graphical abstract: Ambipolar charge distribution in donor–acceptor polymer field-effect transistors

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Nov 2016, accepted on 14 Dec 2016 and first published on 14 Dec 2016

Article type: Paper
DOI: 10.1039/C6TC05033F
Citation: J. Mater. Chem. C, 2017,5, 754-762

  •   Request permissions

    Ambipolar charge distribution in donor–acceptor polymer field-effect transistors

    X. Y. Chin, G. Pace, C. Soci and M. Caironi, J. Mater. Chem. C, 2017, 5, 754
    DOI: 10.1039/C6TC05033F

Search articles by author