The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (90 206 049, 20 472 089), the Major State Basic Research Development Program, and the Chinese Academy of Sciences.
High-Performance and Stable Organic Thin-Film Transistors Based on Fused Thiophenes†
Article first published online: 22 DEC 2005
Copyright © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Functional Materials
Volume 16, Issue 3, pages 426–432, February, 2006
How to Cite
Sun, Y. M., Ma, Y. Q., Liu, Y. Q., Lin, Y. Y., Wang, Z. Y., Wang, Y., Di, C. A., Xiao, K., Chen, X. M., Qiu, W. F., Zhang, B., Yu, G., Hu, W. P. and Zhu, D. B. (2006), High-Performance and Stable Organic Thin-Film Transistors Based on Fused Thiophenes. Adv. Funct. Mater., 16: 426–432. doi: 10.1002/adfm.200500547
- Issue published online: 27 JAN 2006
- Article first published online: 22 DEC 2005
- Manuscript Accepted: 7 SEP 2005
- Manuscript Received: 17 AUG 2005
- Field-effect transistors, organic;
- Thin-film transistors, organic
A series of new organic semiconductors for organic thin-film transistors (OTFTs) using dithieno[3,2-b:2′,3′-d]thiophene as the core are synthesized. Their electronic and optical properties are investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-vis and photoluminescence spectroscopies, thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC). The compounds exhibit an excellent field-effect performance with a high mobility of 0.42 cm2 V–1 s–1 and an on/off ratio of 5 × 106. XRD patterns reveal these films, grown by vacuum deposition, to be highly crystalline, and SEM reveals well-interconnected, microcrystalline domains in these films at room temperature. TGA and DSC demonstrate that the phenyl-substituted compounds possess excellent thermal stability. Furthermore, weekly shelf-life tests (under ambient conditions) of the OTFTs based on the phenyl-substituted compounds show that the mobility for the bis(diphenyl)-substituted thiophene was almost unchanged for more than two months, indicating a high environmental stability.