Journal
NANO ENERGY
Volume 26, Issue -, Pages 180-191Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2016.05.018
Keywords
Organic ternary solar cells; Energy transfer; Charge transfer; Charge transport; Power conversion efficiency
Categories
Funding
- Fundamental Research Funds for the Central Universities [2016YJS161]
- National Natural Science Foundation of China [61377029, 61564003]
- Guangxi Natural Science Foundation [2015GXNSFGA139002]
Ask authors/readers for more resources
A smart ternary strategy was designed to simultaneously improve utilization of excitons on PCDTBT and enhance photon harvesting in long wavelength range by doping appropriate SQ into the dominating PCDTBT:PC71BM system. The phase separation can be finely optimized by adjusting SQ doping ratio, resulting in efficient charge carrier transport channels and the enhanced photon harvesting in the ternary active layers. The dopant SQ provides a potential route for further utilizing the excitons on PCDTBT, especially for the excitons unattainable to the PCDTBT/PC71BM interfaces. The excitons on PCDTBT can transfer their energy to SQ through Forster energy transfer, and then be dissociated into free charge carriers at SQ/PC71BM interface. The holes generated on SQ can be effectively transferred to PCDTBT and then transported along the channels formed by PCDTBT to anode. Consequently, the champion PCE of ternary solar cells arrives to 7.62% with 9 wt% SQ doping ratio in donors, which is much higher than the PCE of 6.54% for PCDTBT:PC71BM-based or 1.95% for SQ:PC71BM-based solar cells. (C) 2016 Elsevier Ltd. All rights reserved.
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