期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 42, 页码 37078-37086出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b11488
关键词
polymer solar cells; non-halogen solvent processin; alkylthio chains; donor material; power conversion efficiency
资金
- National Natural Science Foundation of China [51603136, 91633301, 91333204]
- Jiangsu Provincial Natural Science Foundation [BK20150327]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- China Postdoctoral Science Foundation [2015M581855, 2017T100395]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [15KJB430028]
Nowadays, most of the solution-processed high-efficiency polymer solar cell (PSC) devices are fabricated by halogenated solvents (such as chlorobenzene, 1,2-dichlorobenzene, chloroform, etc.) which are harmful to people and the environment. Therefore, it is essential to develop high-efficiency PSC devices processed by environmentally friendly solvent processing for their industrialization. In this regard, we report a new alkylthio chain-based conjugated polymer PBDB-TS as donor material for environmentally friendly solvent-processed PSCs. PBDB-TS possesses a low-lying HOMO energy level at -5.42 eV and a good solubility in toluene and o-xylene. By using o-xylene and 1% N-methylpyrrolidone as processing solvent, following by the thermal annealing treatment for PBDB-TS:ITIC blend films, well-developed morphological features, and balanced charge transport properties are observed, leading to a high power conversion efficiency (PCE) of 9.85%, higher than that of the device cast from halogenated solvent (PCE = 9.65%). The results suggest that PBDB-TS is an attractive donor material for nonhalogen solvents-processing PSCs.
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