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|
| Type |
Poster Presentation |
| Area |
고분자화학 |
| Room No. |
포스터발표장 |
| Time |
4월 21일 (금요일) 13:00~14:30 |
| Code |
POLY.P-16 |
| Subject |
Analysis on Forming 3-D Effective Charge Transport Pathway in Diketopyrrolopyrrole-Based Copolymers via Controlling of Side Chain Bulkiness |
| Authors |
김상원, 손성윤, 박태호*
POSTECH 화학공학과, Korea
|
| Abstract |
To achieve high processability and planarity, we have newly designed and synthesized novel series of copolymers based on 2,2′-(2,5-dialkoxy-1,4-phenylene)dithieno[3,2-b]thiophene (TT-P-TT) for donor units with various bulky side chains and diketopyrrolopyrrole (DPP) for acceptor units. These copolymers have a highly planar backbone derived from intramolecular interactions. We have investigated the effects of intermolecular interactions on packing structures, thin-film morphologies, and charge transport by controlling the side chain bulkiness of copolymer. Charge transport dynamics of the copolymer based field-effect transistors (FETs) has been investigated. The thin-film microstructures of the copolymers are dependent upon subtle changes in the intermolecular interactions. The copolymer with the smallest side chain shows remarkably high charge carrier mobility, although the size of the fibrillar structures increases as the bulkiness of the side chains in the copolymer increases. Our findings show the condition for forming effective 3-D charge transport pathway and the importance of the molecular packing and interdomain connectivity, rather than the crystalline domain size. The results demonstrate the importance of the side chain bulkiness and provide new insights into the molecular design for high-performance polymer semiconductors. |
| E-mail |
everpass@postech.ac.kr |
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119th General Meeting of the KCS