Journal
CHINESE JOURNAL OF POLYMER SCIENCE
Volume 31, Issue 5, Pages 815-822Publisher
SPRINGER
DOI: 10.1007/s10118-013-1276-x
Keywords
Single molecule solar cells; Monodisperse conjugated oligomers; Lamellar nanostructures; Bulk heterojunction solar cells
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Funding
- Chinese Ministry of Science and Technology [2009CB939702]
- NSFC [20921061, 50833004]
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Five novel donor-acceptor (D-A) conjugated cooligomers (F4B-hP, F5B-hP, F5B2[1,2]-hP, F5B2[1,3]-hP and F7B2[1,2]-hP) were synthesized. The absorption spectra of the cooligomers cover a wide range from 300 nm to 630 nm. The cooligomers could form films featured by alternating D-A lamellar nanostructures with the periods relative to the molecular lengths after thermal annealing or solvent vapor annealing. Single molecule solar cells were fabricated, and F5B-hP exhibited the best device performance. When the film of F5B-hP was thermally annealed, a power conversion efficiency (PCE) of 1.56% was realized. With solvent vapor annealing, the PCE could be further improved to 1.72% with a short-circuit current (J (SC)) of 5.76 mA/cm(2), an open-circuit voltage (V (OC)) of 0.87 V and a fill factor (FF) of 0.34.
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