Journal
ORGANIC ELECTRONICS
Volume 14, Issue 1, Pages 219-229Publisher
ELSEVIER
DOI: 10.1016/j.orgel.2012.11.002
Keywords
D-pi-A molecule; Highest occupied molecular energy level; Organic solar cells (OSCs); 4-Bromoanisole (BrAni)
Funding
- Cluster of Excellence Engineering of Advanced Materials'' at the University of Erlangen-Nuremberg
- German Research Foundation (DFG) [BR 4031/2-1]
- Russian Ministry of Education and Science [11.519.11.6020]
- Program of President of Russian Federation for Support of Young Scientists [MR-1567.2011.3]
- China Scholarship Council (CSC)
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A new star-shaped D-pi-A molecule, tris{4-[5 ''-(1,1-dicyanobut-1-en-2-yl)-2,2'-bithiophen-5-yl] phenyl} amine N(Ph-2T-DCN-Et)(3), with high efficiency potential for photovoltaic applications was synthesized. As compared to its analogue S(TPA-bT-DCN), it showed stronger absorption in the region of 350-450 nm and a lower lying highest occupied molecular energy level (HOMO). Solution-processed organic solar cells (OSCs) based on a blend of N(Ph-2T-DCN-Et)(3) and PC70BM resulted in a high PCE of 3.1% without any post-treatment. The PCE of N(Ph-2T-DCN-Et)(3) based solar cells was further improved to 3.6% under simulated AM 1.5 by addition of a new additive 4-bromoanisole (BrAni). (C) 2012 Elsevier B.V. All rights reserved.
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