Title :
Effects of the polymeric dielectric on OTFT performances
Author :
Petrosino, Mario ; Rubino, Alfredo ; Miscioscia, Riccardo ; Del Mauro, Anna De Girolamo ; Minarini, Carla
Author_Institution :
Dept. of Inf. & Electr. Eng., Univ. of Salerno, Salerno, Italy
Abstract :
Three polymers have been tested as gate dielectric in pentacene-OTFTs: polyimide, polystyrene and commercial photoresist. The electrical characterizations revealed a gate leakage current and the effects of source and drain contact barriers both responsible of the non-crossing of the curves into the IS-VDS diagram origin. An electrical model have been proposed taking into account the gate leakage current and the VDS shift by inserting two gate-diodes and a voltage source. The model has allowed to estimate the correct values of the channel mobility and the device voltage threshold.
Keywords :
carrier mobility; dielectric materials; leakage currents; organic field effect transistors; polymers; thin film transistors; OTFT performance; channel mobility; commercial photoresist; contact barrier; device voltage threshold; electrical model; gate dielectric; gate leakage current; pentacene OTFT; polyimide; polymeric dielectric; polystyrene; Contacts; Dielectrics; Leakage current; Organic thin film transistors; Polyimides; Polymers; Resists; Testing; Thin film transistors; Voltage; OTFT; electrical modelling; mobility; pentacene; polymer dielectric;
Conference_Titel :
Signals, Circuits and Systems (SCS), 2009 3rd International Conference on
Conference_Location :
Medenine
Print_ISBN :
978-1-4244-4397-0
Electronic_ISBN :
978-1-4244-4398-7
DOI :
10.1109/ICSCS.2009.5412549
