Citation: Shi Yanan, Yang Chen, Li Huan, Liu Lixuan, Zhou Ruimin, Zou Wenjun, Wang Zhen, Wu Qiong, Deng Dan, Zhang Jianqi, Lu Kun, Wei Zhixiang. A-π-D-π-A small-molecule donors with different end alkyl chains obtain different morphologies in organic solar cells[J]. Chinese Chemical Letters, ;2019, 30(4): 906-910. doi: 10.1016/j.cclet.2019.01.031 shu

A-π-D-π-A small-molecule donors with different end alkyl chains obtain different morphologies in organic solar cells

Shi Yanan ^a,b,1 ,
Yang Chen ^a,b,1 ,
Li Huan ^a,b ,
Liu Lixuan ^a,b ,
Zhou Ruimin ^a,c ,
Zou Wenjun ^a,*, ,
Wang Zhen ^a,b ,
Wu Qiong ^a,b ,
Deng Dan ^a ,
Zhang Jianqi ^a ,
Lu Kun ^a,*, ,
Wei Zhixiang ^a,b

a.
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
b.
University of Chinese Academy of Sciences, Beijing 100049, China
c.
Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100190, China

zouwj@nanoctr.cn

lvk@nanoctr.cn

Received Date: 29 December 2018
Revised Date: 25 January 2019
Accepted Date: 28 January 2019
Available Online: 30 April 2019

Figures(6)

For bulk-heterojunction organic solar cells, the morphology of the blend films highly influence the exciton dissociation and charge transport process. In this work, two novel A-π-D-π-A (A represents the acceptor unit and D represents the donor unit) backbone structure small molecular electron donors based on two dimensional conjugated naphtho[1, 2-b:5, 6-b']dithiophene (NDT) with different end alkyl chains, named as NDT-3T-EH and NDT-3T-O, have been designed and synthesized. The photovoltaic property of NDT-3T-O-based device is better than that of the NDT-3T-EH and the best efficiency reaches 7.06%, and the photovoltaic property of NDT-3T-EH reaches 6.11%. The difference in the performance should be attributed to the different morphology and phase separation resulted from the different crystallinity and aggregation ability of two donors. The results demonstrate that the optimized end alkyl chains can be used to design A-π-D-π-A backbone structure small molecular electron donors for smallmolecule organic solar cells.
- Organic solar cells,
- All-small-molecule,
- A-π-D-π-A small molecular donor,
- End alkyl chain,
- Morphology of active layer
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