Synthesis and Characterization of Poly(Dithieno[3,2‐b:2′,3′‐d]pyrrole) Derivatives Containing Thiophene Moieties and Their Application to Organic Devices |
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| Authors: | Hyung‐Gu Jeong Bogyu Lim Seok‐In Na Kang‐Jun Baeg Juhwan Kim Jin‐Mun Yun Dong‐Yu Kim |
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| Affiliation: | 1. Heeger Center for Advanced Materials (HCAM), School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan‐gwagiro, Buk‐Gu, Gwangju 500‐712, Republic of Korea;2. Department of Material Science and Engineering, Center for Advanced Molecular Photovoltaics (CAMP), Stanford University, Stanford, CA 94305, USA;3. Korea Institute of Science and Technology (KIST), 864‐9, Dusan‐ri, Bongdong‐eup, Wanju‐gun, Jeollabuk‐do 565‐902, Republic Korea;4. Electronics and Telecommunications Research Institute (ETRI), 138 Gajeongno, Yuseong‐gu, Daejeon 305‐700, Republic of Korea |
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| Abstract: | A series of conjugated polymers (PDTP, PDTPT, PDTPTT) based on dithieno[3,2‐b:2′,3′‐d]pyrrole (DTP) containing branched side‐chains is synthesized. The synthesized polymers show good solubility due to branched side‐chains in the organic solvent in the absence of heat treatment. To increase the oxidation potential, unsubstituted thiophene units are introduced into the polymer backbone. The introduction of unsubstituted thiophene units increases the oxidation potential, elevates degradation temperature, and enhances electronic properties. The PDTPTT FETs show the highest charge‐carrier mobility among the three polymers. These polymers are used as a donor material in bulk heterojunction solar cells, and the PDTPTT photovoltaic cells exhibit high performance. |
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| Keywords: | conjugated polymers dithienopyrrole organic field‐effect transistors organic solar cells |
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