Studies of photogenerated charge carriers from donor-acceptor interfaces in organic field effect transistors. Implications for organic solar cells

Manohar Rao, Rocio Ponce Ortiz, Antonio Facchetti, Tobin J Marks, K. S. Narayan

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Bilayer organic field effect transistor (OFET) structures consisting of an optically active electron donor (D) and an electrically active electron acceptor (A) system offer a quantitative device tool for characterizing photoinduced charge transport processes. Here, we report an investigation of the photoinduced response of a bilayer OFET fabricated from a naphthalene-bis(dicarboximide)- based polymer (N2200) as the n-channel A transport layer and a p-channel regioregular poly-3-hexylthiophene (P3HT) top D layer. This FET exhibits characteristic steady-state spectral response as well as transient profiles as a function of the gate voltage (Vg), yielding valuable information on bulk and interfacial charge transport properties. Thus, the derived N2200 electron mobility is shown to be in good agreement with bulk measurements (significantly greater than that of PCBM), and the N2200/P3HT interface is shown to be a highly efficient structure for charge transfer and free carrier generation.

Original languageEnglish
Pages (from-to)20609-20613
Number of pages5
JournalJournal of Physical Chemistry C
Volume114
Issue number48
DOIs
Publication statusPublished - Dec 9 2010

Fingerprint

Organic field effect transistors
Charge carriers
Charge transfer
charge carriers
field effect transistors
solar cells
D region
Electron transport properties
Electrons
Electron mobility
Naphthalene
Field effect transistors
spectral sensitivity
electron mobility
naphthalene
Transient analysis
Polymers
electrons
transport properties
charge transfer

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Studies of photogenerated charge carriers from donor-acceptor interfaces in organic field effect transistors. Implications for organic solar cells. / Rao, Manohar; Ortiz, Rocio Ponce; Facchetti, Antonio; Marks, Tobin J; Narayan, K. S.

In: Journal of Physical Chemistry C, Vol. 114, No. 48, 09.12.2010, p. 20609-20613.

Research output: Contribution to journalArticle

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