Journal
DYES AND PIGMENTS
Volume 149, Issue -, Pages 830-842Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2017.11.048
Keywords
Small molecule donors; Bulk heterojunction solar cells; Solvent vapor annealing; Power conversion efficiency
Funding
- Artificial Leaf Project Umea (K&A Wallenberg foundation) [KAW 2011.0055]
- JC Kempe Foundation
Ask authors/readers for more resources
Two new acceptor-pi(donor)-donor-,pi(donor)-acceptor small molecules SM1 and SM2 with benzodithiophene (BDT) donor core unit linked via phenothiazine (PTZ) donor units with 1,3-indanedione and malononitrile end capping units, respectively, have been designed and synthesized and used as electron donor along with PC71BM as acceptor for solution-processed bulk heterojunction organic solar cells. The influence of these end-capping groups on their thermal, optical, electrochemical properties and photovoltaic performance was investigated. After the optimization of the donor to acceptor weight ratio and solvent vapor annealing, the organic solar cells based on SM1:PC71BM and SM2:PC71BM active layers showed the power conversion efficiency (PCE) of 6.20% and 7.45%, respectively. Hence, the end-capping acceptor units for the two small molecules revealed a significant influence on the PCE of the organic solar cells, which resulted from differences in film absorption, molecular packing and charge transport properties.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available