A bridged low band gap A–D–A quaterthiophene as efficient donor for organic solar cells
2015 ◽
Vol 3
(2)
◽
pp. 390-398
◽
Covalent bridging of the central 2,2′-bithiophene of α,ω-bis(dicyanovinyl)quaterthiophene derivatives leads to a reduced band gap and efficient organic solar cells.