Karsten B.P.Viani L.Gierschner, JohannesCornil J.Janssen R.A.J.2020-12-042020-12-042009http://hdl.handle.net/20.500.12614/295enAtribución-NoComercial-SinDerivadas 3.0 EspañaOn the origin of small band gaps in alternating thiophene - thienopyrazine oligomersresearch article10.1021/jp9050148open access