期刊
CHEMICAL SCIENCE
卷 8, 期 7, 页码 5095-5100出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sc01275f
关键词
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资金
- New and Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry and Energy, Republic of Korea [20163030013960]
- National Research Foundation (NRF) [2016M1A2A2940912]
- Mid-Career Researcher Program [2014R1A2A1A10051083]
- NRF Grant - NRF of Korean Government [2016R1A5A1012966, 2017R1C1B2010694]
- Global Scholarship Program for Foreign Graduate Students at Kookmin University in Korea
- UCRF
- MSIP
- POSTECH
- National Research Foundation of Korea [2016M1A2A2940912] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A near-infrared-harvesting n-type porphyrin-based acceptor for organic photovoltaics (OPVs) was developed. The n-type acceptor, PDI-P-Zn-PDI, was designed by connecting a zinc porphyrin (P-Zn) core to two perylenediimide (PDI) wings through ethyne bridges. A narrow bandgap of 1.27 eV was achieved through the extended p-conjugation and intramolecular charge transfer between the strongly electron-donating P-Zn core and the electron-accepting PDI wings. A bulk heterojunction (BHJ) structured photovoltaic device fabricated from PDI-P-Zn-PDI with PTB7-Th exhibited panchromatic photon-to-current conversion from 350 to 900 nm. A power conversion efficiency of 5.25% with a remarkably low E-loss of 0.54 eV was achieved by optimizing the nanomorphology of the BHJ films by adding pyridine and by controlling the ZnO/BHJ interfacial properties.
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