title: New D-π-A-conjugated organic sensitizers based on 4H-pyran-4-ylidene donors for highly efficient dye-sensitized solar cells.
abstract: We have synthesized a series of four new promising D-π-A conjugated organic sensitizers with a proaromatic 4H-pyran-4-ylidene as a donor, a thiophene ring in the bridge, and 2-cyanoacrilic acid as acceptor. Comparison between different donor substituents and the modification of the thiophene ring resulted in molar extinction coefficients as high as 36399 M(-1) cm(-1) at 551 nm. The photovoltaic properties of the DSSCs demonstrate power conversion efficiencies as high as 5.4%.
authors.affiliation: Departamento de Química Orgánica, ICMA, Universidad de Zaragoza-CSIC, E50009 Zaragoza, Spain. sfranco@unizar.es
authors.forename: Santiago
authors.initials: S
authors.lastname: Franco
authors.forename: Javier
authors.initials: J
authors.lastname: Garín
authors.forename: Natalia Martínez
authors.initials: NM
authors.lastname: de Baroja
authors.forename: Raquel
authors.initials: R
authors.lastname: Pérez-Tejada
authors.forename: Jesús
authors.initials: J
authors.lastname: Orduna
authors.forename: Youhai
authors.initials: Y
authors.lastname: Yu
authors.forename: Mónica
authors.initials: M
authors.lastname: Lira-Cantú