Citation: Jian-fei Qu, Jian Liu, Si-da Li, Zhi-yuan Xie, Yan-hou Geng. DONOR-ACCEPTOR CONJUGATED COOLIGOMERS FOR SINGLE MOLECULE SOLAR CELLS[J]. Chinese Journal of Polymer Science, ;2013, 31(5): 815-822. doi: 10.1007/s10118-013-1276-x shu

DONOR-ACCEPTOR CONJUGATED COOLIGOMERS FOR SINGLE MOLECULE SOLAR CELLS

Corresponding author: Yan-hou Geng,
Received Date: 24 December 2012
Revised Date: 31 January 2013

Fund Project: This work was financially supported by the National Basic Research Program of China (973 Project, No. 2009CB939702) of Chinese Ministry of Science and Technology and NSFC (Nos. 20921061 and 50833004).

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 (JSC) of 5.76 mA/cm2, an open-circuit voltage (VOC) of 0.87 V and a fill factor (FF) of 0.34.
- Single molecule solar cells,
- Monodisperse conjugated oligomers,
- Lamellar nanostructures,
- Bulk heterojunction solar cells
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