Abstract
A new star-shaped D-π-A molecule, tris4-[5′′-(1,1- dicyanobut-1-en-2-yl)-2,2′-bithiophen-5-yl]phenylamine 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). © 2012 Elsevier B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 219-229 |
Number of pages | 11 |
Journal | Organic Electronics |
Volume | 14 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2013 |
Keywords
- Cell engineering
- Molecules
- Organic solar cells
- Stars
- Synthesis (chemical)
- 4-Bromoanisole (BrAni)
- High-efficiency
- Molecular energy levels
- Photovoltaic applications
- Solution processable
- Solution-processed
- Solvent additives
- Star-shaped molecules
- Solar cells