Synthesis and Characterization of New Thermally Stable Poly(naphthodithiophene) Derivatives and Applications for High Performance Organic Thin Film Transistors
SCIE
SCOPUS
- Title
- Synthesis and Characterization of New Thermally Stable Poly(naphthodithiophene) Derivatives and Applications for High Performance Organic Thin Film Transistors
- Authors
- Moon Chan Hwang; Jae-Wan Jang; Tae Kyu An; Park, CE; Yun-Hi Kim; Soon-Ki Kwon
- Date Issued
- 2012-06-12
- Publisher
- AMER CHEMICAL SOC
- Abstract
- A series of new p-type polymers, PNDT-T and PNDT-TT, with enforced coplanar structure for effective pi-electron delocalization, having naphtho[2,1-b:3,4-b']-dithiophene and thiophenes as main core units, were successfully synthesized by Stille coupling reaction. The naphtho[2,1-b:3,4-b']dithiophene unit of the polymer main chain enhances charge carrier mobility by extending pi-conjugation length and rigidly enforced coplanar structure. Both polymers, PNDT-T and PNDT-TT, have high thermal stability up to 250 degrees C with a high T-g of 402 degrees C. On the basis of AFM and XRD results, it was found that PNDT-TT showed relatively more highly ordered intermolecular structures than did PNDT-T, with thiophene unit and high field-effect mobility, because the bithiophene unit provides crystallinity with increasing planarity and enough space for interdigitation of the long alkyl side chains for high order. These new p-type polymers PNDT-T and PNDT-TT exhibit high carrier mobilities of 0.01 and 0.076 cm(2)/(V s) and on/off ratios of 4 x 10(5) and 7 x 10(6), respectively. The above results indicate that the plate structure with a sulfur-containing fully aromatic system, which has the upper direction extended, could enhance the thermal stability and charge transport characteristics for OTFT applications.
- Keywords
- FIELD-EFFECT TRANSISTORS; SOLAR-CELLS; SEMICONDUCTING POLYMERS; HIGH-MOBILITY; CYCLIZATION; COPOLYMERS; MORPHOLOGY; STABILITY; STRATEGY; ELECTRON
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15564
- DOI
- 10.1021/MA300540F
- ISSN
- 0024-9297
- Article Type
- Article
- Citation
- Macromolecules, vol. 45, no. 11, page. 4520 - 4528, 2012-06-12
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.