Journal
SCIENCE CHINA-CHEMISTRY
Volume 63, Issue 3, Pages 325-330Publisher
SCIENCE PRESS
DOI: 10.1007/s11426-019-9669-3
Keywords
single junction; binary system; power conversion efficiencies; open-circuit voltage
Categories
Funding
- Shen Zhen Technology and Innovation Commission [JCYJ20170413173814007, JCYJ 20170818113905024]
- Hong Kong Research Grants Council (Research Impact Fund) [R6021-18, 16305915, 16322416, 606012, 16303917]
- Hong Kong Innovation and Technology Commission [ITCCNERC14SC01, ITS/471/18]
- National Natural Science Foundation of China [51573120, 51973146, 91633301]
- Collaborative Innovation Center of Suzhou Nano Science Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Ask authors/readers for more resources
Power conversion efficiency (PCE) of single-junction polymer solar cells (PSCs) has made a remarkable breakthrough recently. Plenty of work was reported to achieve PCEs higher than 16% derived from the PM6:Y6 binary system. To further increase the PCEs of binary OSCs incorporating small molecular acceptor (SMA) Y6, we substituted PM6 with PM7 due to the deeper highest occupied molecular orbital (HOMO) of PM7. Consequently, the PM7:Y6 has achieved PCEs as high as 17.0% by the hotcast method, due to the improved open-circuit voltage (VOC). Compared with PM6, the lower HOMO of PM7 increases the gap between ELUMO-donor and EHOMO-acceptor, which is proportional to V-OC. This research provides a high PCE for single-junction binary PSCs, which is meaningful for device fabrication related to PM7 and commercialization of PSCs.
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