β-Alkyl substituted Dithieno[2,3-d;2′,3′-d′]benzo[1,2-b;4,5-b′]dith iophene Semiconducting Materials and Their Application to Solution-Proce ssed Organic Transistors
- Author(s)
-
Kim, Jonggi, Han, A-Reum, Seo, Jung Hwa, Oh, Joon Hak, Yang, Changduk
- Issued Date
-
2012-09
- DOI
-
10.1021/cm301816t
- URI
-
https://scholarworks.unist.ac.kr/handle/201301/3410
- Fulltext
-
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84866127691
- Citation
-
CHEMISTRY OF MATERIALS, v.24, no.17, pp.3464 - 3472
- Abstract
-
A novel highly pi-extended heteroacene with four symmetrically fused thiophene-ring units and solubilizing substituents at the terminal a-positions on the central ring, dithieno[2,3-d;2',3'-d]benzo[1,2-b;4,5-b]dithiophene (DTBDT) was synthesized via intramolecular electrophilic coupling reaction. The a-positions availability in the DTBDT motif enables the preparation of solution-processable DTBDT-based polymers such as PDTBDT, PDTBDT-BT, PDTBDT-DTBT, and PDTBDT-DTDPP. Even with its highly extended acene-like pi-framework, all polymers show fairly good environmental stability of their highest occupied molecular orbitals (HOMOs) from -5.21 to -5.59 eV. In the course of our study to assess a profile of semiconductor properties, field-effect transistor performance of the four DTBDT-containing copolymers via solution-process is characterized, and PDTBDT-DTDPP exhibits the best electrical performance with a hole mobility of 1.70 X 10(-2) cm(2) V-1 s(-1). PDTBDT-DTDPP has a relatively smaller charge injection barrier for a hole from the gold electrodes and maintains good coplanarity of the polymer backbone, indicating the enhanced pi-pi stacking characteristic and charge carrier transport. The experimental results demonstrate that our molecular design strategy for air-stable, high-performance organic semiconductors is highly promising.
- Publisher
-
AMER CHEMICAL SOC
- ISSN
-
0897-4756
- Keyword (Author)
-
dithieno[2,3-d, 2 &apos, ,3 &apos, d &apos, ]benzo[1,2-b, 4,5-b &apos, ]dithiophene, heteroacenes, thiophene-benzene annulated acenes, organic field-effect transistors (OFETs), polymeric semiconductors
- Keyword
-
FIELD-EFFECT TRANSISTORS, THIN-FILM TRANSISTORS, HIGH-PERFORMANCE, TRANSPORTING POLYMER, FUSED THIOPHENES, PENTACENE, MOBILITY, FIBERS, LADDER
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.