Davoud Dastan
Cornell University, USA
Title: Flexible organic field effect transistors with enhanced electrical properties
Biography
Biography: Davoud Dastan
Abstract
Bottom-gate top-contact organic field effect transistors (OFET’s) have been fabricated on flexible substrates. Organic/inorganic materials are used as gate dielectric to enhance the output and transfer characteristics of the fabricated devices. Rutile titania nanoparticles (NP’s) were prepared using solvothermal technique and incorporated into poly vinyl alcohol (PVA) to improve the capacitance and therefore dielectric constant of the host matrix. The composite films were exposed to ozone treatment and the gold contacts were thermally made on top of the films through a shadow mask. The gate dielectric was treated with a self-assembled monolayer (SAM) of octadecyltrichlorosilane (OTS) and then an active layer of copper phthalocyanine (CuPc6) was deposited on top of the films. The output and transfer characteristics of the fabricated FET’s were measured using semiconductor parameter analyzer. OFET’s treated with a SAM of OTS exhibited higher mobility, on-off current ratio, and lower threshold voltage than the devices without a SAM of OTS treatment.
