Fluorination of Benzothiadiazole–Benzobisthiazole Copolymer Leads to Additive-Free Processing with Meliorated Solar Cell Performance
| Autor: | Akinori Saeki, Marina Ide, Anesh Gopal, Shu Seki |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Materials science Organic solar cell Renewable Energy Sustainability and the Environment General Chemical Engineering Analytical chemistry General Chemistry Polymer Acceptor Polymer solar cell law.invention Solvent chemistry.chemical_compound Chemical engineering chemistry law Chlorobenzene Solar cell Copolymer Environmental Chemistry |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 2:2613-2622 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/sc5005617 |
| Popis: | Processing solvents and conditions have unique importance in the performance of bulk heterojunction organic solar cells. In the present work, we have investigated the role of a primary solvent and solvent additive in the device performance of two benzobisthiazole (BBTz)-based push–pull type polymers. In an inverted cell structure, the BBTz-co-fluorinated benzothiadiazole polymer (PBBTzFT) with a PC71BM acceptor showed additive-free enhanced performance with a power conversion efficiency (PCE) of 6.4% from a 1,2-dichlorobenzene solvent, while the BBTz-co-pyridylthiadiazole polymer (PBBTzPT) showed maximum performance from a chlorobenzene (CB) solution with a 1,8-diiodooctane (DIO) additive (PCE = 2.3%). The detailed investigation by atomic force microscopy and two-dimensional grazing incidence X-ray diffraction corroborates that the fluorination of benzothiadiazole brought about optimal morphology without a solvent additive, the PCE of which is comparable with the previous nonfluorinated analogue (PCE = 6.... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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