期刊
CHEMPHYSCHEM
卷 16, 期 6, 页码 1190-1202出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201402662
关键词
electron acceptors; isoindigo; microwave-assisted synthesis; organic solar cells; solution-processed small molecules
资金
- NSERC DREAMS
An electron-deficient small molecule accessible from sustainable isoindigo and phthalimide building blocks was synthesized via optimized synthetic procedures that incorporate microwave-assisted synthesis and a heterogeneous catalyst for Suzuki coupling, and direct heteroarylation carbon-carbon bond forming reactions. The material was designed as a non-fullerene acceptor with the help of DFT calculations and characterized by optical, electronic, and thermal analysis. Further investigation of the material revealed a differing solid-state morphology with the use of three well-known processing conditions: thermal annealing, solvent vapor annealing and small volume fractions of 1,8-diiodooctane (DIO) additive. These unique morphologies persist in the active layer blends and have demonstrated a distinct influence on device performance. Organic photovoltaic-bulk heterojunction (OPV-BHJ) devices show an inherently high open circuit voltage (V-oc) with the best power conversion efficiency (PCE) cells reaching 1.0 V with 0.4 v/v% DIO as a processing additive.
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