Title: Analysis of electrode thickness variation on performance parameters of polymer thin film transistors using device simulation
Authors: Brijesh Kumar; Brajesh Kumar Kaushik; Yuvraj Singh Negi
Addresses: Department of Polymer and Processing Engineering, Indian Institute of Technology (IIT) Roorkee, Saharanpur Campus, Roorkee-247667, Uttarakhand, India ' Department of Electronics and Computer Engineering, Indian Institute of Technology, Roorkee-247667, India ' Department of Polymer and Processing Engineering, Indian Institute of Technology (IIT) Roorkee, Saharanpur Campus, Roorkee-247667, Uttarakhand, India
Abstract: This paper provides a detailed analysis of top and bottom gate polymer thin film transistor (PTFT) structures for different positions of the source and drain contacts through 2D device simulation. The performances of all the structures are compared in terms of electrical parameters keeping structural dimensions and material properties constant. Further analysis extends to bottom gate devices with an infinitesimal contact thickness to 25 nm. The results reveal higher drain current for top contact and changes minutely with the contact thickness, however up to three times increment is observed for bottom contact, but comparatively the current magnitude is still lower than the top contact device. Further higher on-off current ratio, transconductance and mobility is extracted for top contact and an average variation of 0.002 cm²/V.s in mobility is noticed for every 5 nm change in thickness, whereas, linear increment is observed while contacts are at bottom.
Keywords: bottom gate bottom contact; BGBC; bottom gate top contact; BGTC; top gate bottom contact; TGBC; top gate top contact structure; electrode thickness variation; 2D device simulation; mobility; polymer thin film transistors; PTFT; advanced intelligence; flexible displays; electrical performance parameters.
International Journal of Advanced Intelligence Paradigms, 2013 Vol.5 No.1/2, pp.3 - 15
Received: 27 Mar 2012
Accepted: 05 Oct 2012
Published online: 30 Jul 2014 *