title: Tuning the threshold voltage in electrolyte-gated organic field-effect transistors.
abstract: Low-voltage organic field-effect transistors (OFETs) promise for low power consumption logic circuits. To enhance the efficiency of the logic circuits, the control of the threshold voltage of the transistors are based on is crucial. We report the systematic control of the threshold voltage of electrolyte-gated OFETs by using various gate metals. The influence of the work function of the metal is investigated in metal-electrolyte-organic semiconductor diodes and electrolyte-gated OFETs. A good correlation is found between the flat-band potential and the threshold voltage. The possibility to tune the threshold voltage over half the potential range applied and to obtain depletion-like (positive threshold voltage) and enhancement (negative threshold voltage) transistors is of great interest when integrating these transistors in logic circuits. The combination of a depletion-like and enhancement transistor leads to a clear improvement of the noise margins in depleted-load unipolar inverters.
authors.affiliation: Department of Science and Technology, Organic Electronics, Linköping University SE-601 74 Norrköping, Sweden.
authors.forename: Loïg
authors.initials: L
authors.lastname: Kergoat
authors.forename: Lars
authors.initials: L
authors.lastname: Herlogsson
authors.forename: Benoit
authors.initials: B
authors.lastname: Piro
authors.forename: Minh Chau
authors.initials: MC
authors.lastname: Pham
authors.forename: Gilles
authors.initials: G
authors.lastname: Horowitz
authors.forename: Xavier
authors.initials: X
authors.lastname: Crispin
authors.forename: Magnus
authors.initials: M
authors.lastname: Berggren
mesh_terms: D000465:Algorithms; D004553:Electric Conductivity; D004573:Electrolytes / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D008956:Models, Chemical; D009930:Organic Chemicals / Q000737:chemistry*; D014173:Transistors, Electronic
chemical_list: D004573:Electrolytes; D008670:Metals; D009930:Organic Chemicals