Bis(dithienothiophene) organic field-effect transistors with a high ON/OFF ratio
- 29 December 1997
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 71 (26) , 3871-3873
- https://doi.org/10.1063/1.120529
Abstract
A conjugated, fused-thiophene oligomer, bis(dithienothiophene) (BDT), has been synthesized and deposited by vacuum sublimation as the active layer in organic thin film transistors (TFTs). The TFTs show exceptionally high ON/OFF ratios up to 108 between accumulation and depletion with sharp turn-on characteristics comparable to that of amorphous silicon TFTs (subthreshold slope S=0.6 V/decade). Field-effect mobilities are 0.02–0.05 cm2/V s. The good performance is explained by the relatively high π-π* gap of the short-chain BDT molecule and the favorable coplanar π-π stacking in BDT, differing from the herringbone stacking in the oligothiophenes.Keywords
This publication has 13 references indexed in Scilit:
- Recent developments in the controlled synthesis and manipulation of electroactive organic polymersPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 1997
- Pentacene organic thin-film transistors-molecular ordering and mobilityIEEE Electron Device Letters, 1997
- Benzodithiophene Rings as Semiconductor Building BlocksAdvanced Materials, 1997
- Soluble and processable regioregular poly(3-hexylthiophene) for thin film field-effect transistor applications with high mobilityApplied Physics Letters, 1996
- Organic field-effect transistors with high mobility based on copper phthalocyanineApplied Physics Letters, 1996
- High field-effect-mobility a-Si:H TFT based on high deposition-rate PECVD materialsIEEE Electron Device Letters, 1996
- Transport studies in C60 and C60/C70 thin films using metal-insulator-semiconductor field-effect transistorsSynthetic Metals, 1996
- C60 thin film transistorsApplied Physics Letters, 1995
- Organic Transistors: Two-Dimensional Transport and Improved Electrical CharacteristicsScience, 1995
- Molecular engineering of organic semiconductors: design of self-assembly properties in conjugated thiophene oligomersJournal of the American Chemical Society, 1993