期刊
MACROMOLECULES
卷 47, 期 24, 页码 8570-8577出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma501888z
关键词
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资金
- National Research Foundation of Korea (NRF) - Korean Government (MSIP) [NRF-2014R1A2A1A05004993, 2012M3A7B4049647, 2012R1A2A2A06047047]
- National Research Foundation of Korea [2012R1A2A2A06047047, 2012M3A7B4049647] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
ADA conjugated polymer, PTPD-TVT, containing thienopyrroledione and thiophenevinylenethiophene (TVT) units was synthesized as an electron donor for organic photovoltaic devices. It possesses a small bandgap and has excellent coplanarity and high hole mobility. To further enhance the interchain interactions between the polymer chains, a selenophenevinyleneselenophene (SVS) unit was also introduced and copolymerized to form the PTPD-SVS polymer. Devices made from PTPD-TVT and PTPD-SVS have rather promising power conversion efficiencies (PCEs) of 4.87 and 5.74%, respectively. The higher PCE value for solar cells based on PTPD-SVS was attributed to an enhanced carrier mobility resulting from stronger interchain aggregation in the BHJ active layer. These results show that the incorporation of a vinylene unit in TPD-based polymers is an effective way to reduce the bandgap and thereby improve charge transport for efficient photovoltaic devices.
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