Share Email Print
cover

Proceedings Paper

Mesophase semiconductors and the field effect transistors
Author(s): Y. Shimizu; K. Oikawa; K. Nakayama; H. Monobe; T. Kimoto; K. Tsuchiya; B. Heinrich; D. Guillon; M. Yokoyama
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Here we show the simple fabrication of field effect transistor (FET) with a mesophase semiconductor, a derivative of dithienyl naphthalene, which exhibits a fast mobility (10-1 ~ 10-2 cm2 V-1 s-1) of charged carriers in the mesophase. The compound is a mesogen, but with highly ordered layered structure in a triclinic lattice, meaning a 3D-mesophase is formed. The device performance was studied for the transistor mobility, on/off ratio and threshold voltage of device operation, to have 0.14 cm2 V-1 s-1, 2 x 103 and -27 V at room temperature (in a crystal phase), respectively, even though the thin film active layer (100 nm thick) does have a multi-domain system. However, the XRD studies indicate the uniformly aligned molecules in each domain, of which long axis is inclined to be ca. 27° against the axis perpendicular to the substrate plane. This implies that a self-assembling nature of mesogenic molecules is a certain merit for thin film device fabrication in organic electronics.

Paper Details

Date Published: 12 September 2007
PDF: 8 pages
Proc. SPIE 6654, Liquid Crystals XI, 66540I (12 September 2007); doi: 10.1117/12.734910
Show Author Affiliations
Y. Shimizu, National Institute of Advanced Industrial Science and Technology, Kansai (Japan)
K. Oikawa, KANTO Chemical Co., Inc. (Japan)
K. Nakayama, Yamagata Univ. (Japan)
H. Monobe, National Institute of Advanced Industrial Science and Technology, Kansai (Japan)
T. Kimoto, KANTO Chemical Co., Inc. (Japan)
K. Tsuchiya, KANTO Chemical Co., Inc. (Japan)
B. Heinrich, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR CNRS-ULP (France)
D. Guillon, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR CNRS-ULP (France)
M. Yokoyama, Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 6654:
Liquid Crystals XI
Iam Choon Khoo, Editor(s)

© SPIE. Terms of Use
Back to Top