| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 가을 (11/04 ~ 11/06, 제주국제컨벤션센터(ICCJEJU)) |
| 권호 |
19권 2호 |
| 발표분야 |
고분자_포스터 |
| 제목 |
Improving the Performances of Ambipolar Transistors based on Rigid Planar Low Band Gap Polymers through the Use of a Binary Solvent System |
| 초록 |
The carrier mobility in an organic thin film transistor (OTFT) is strongly associated with the semiconducting film morphology. The shrewd selection of processing solvents is critical for managing the morphology of the semiconducting polymer film. Here, we report the synthesis of a new low band gap planar polymer composed of PTTDPP-DT-DTT and the performance improvements of the PTTDPP-DT-DTT-based OTFTs obtained using a binary solvent system: (i) chloroform (CF):toluene (Tol), (ii) CF:chlorobenzene (CB), and (iii) CF:o-dichlorobenzene (DCB) (volume ratio of 16:1). The high boiling points (bps) of the added solvents increased the film crystallinity, and an edge-on orientation among the molecules was promoted. Thus, the use of CF:DCB yielded the highest carrier mobility obtained among the devices tested. Thermal annealing further enhanced the carrier mobility of the CF:DCB device. Atomic force microscopy images confirmed that the thermally annealed CF:DCB polymer film displayed the most fibrous character. This work emphasizes that the proper selection of processing solvent is critical for exploiting the beneficial characteristics of rigid planar conjugated polymer semiconductors for the preparation of high-performance OTFTs. |
| 저자 |
김봉수1, 조정호2, 이정헌2, 강영종3, 김현정4, 안국일4, 최종용3, 김민제2
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| 소속 |
1이화여자대, 2성균관대, 3한양대, 4서강대 |
| 키워드 |
Organic field-effect transistor; low band gap semiconducting polymer; high carrier mobility; binary solvent; film crystallinity |
| E-Mail |
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