Articolo in rivista, 2011, ENG, 10.1063/1.3585658

Ambipolar copper phthalocyanine transistors with carbon nanotube array electrodes

Iannotta, Salvatore (1); Cicoira, Fabio (2); Coppedè, Nicola (1); Martel, Richard (3)

(1) CNR-IMEM, Parma; (2) Département de Chimie, Université de Montréal, Montréal, Canada and CNR-IMEM, Parma; (3) Département de Chimie, Université de Montréal, Montréal, Canada

We report on organic thin film transistors (OTFTs) based on copper phthalocyanine (CuPc) having electrodes consisting of isolated carbon nanotube (CNT) arrays embedded in the organic layer. CuPc OTFT with CNT array electrodes show p-type behavior with Ohmic hole injection, high hole mobility, and enhanced switching characteristics at low voltage. The p-type devices are converted to ambipolar OTFT by vacuum annealing. Despite the large offset between the CNT work function and the CuPc energy levels, electron injection characteristics are also Ohmic. The extension of CNT electrodes to the phthalocyanine family confirms the validity of this contact approach for organic electronic devices.

Applied physics letters 98 (18), pp. 1–3

Keywords

FIELD-EFFECT TRANSISTORS, THIN-FILM TRANSISTORS, TRANSPORT-PROPERTIES, 85.30.Tv, 85.35.Kt

CNR authors

Cicoira Fabio, Iannotta Salvatore, Coppede Nicola

CNR institutes

IMEM – Istituto dei materiali per l'elettronica ed il magnetismo