title: Sterically hindered phthalocyanines for dye-sensitized solar cells: influence of the distance between the aromatic core and the anchoring group.
abstract: A new phthalocyanine (Pc) bearing bulky peripheral substituents and a carboxylic anchoring group directly attached to the macrocycle has been prepared and used as a sensitizer in DSSCs, reaching 5.57% power conversion efficiency. In addition, an enhanced performance for the TT40 dye, previously reported by us, was achieved in optimized devices, obtaining a new record efficiency with Pc-sensitized cells.
authors.affiliation: Universidad Autónoma de Madrid, Departamento de Química Orgánica, Cantoblanco, 28049 Madrid (Spain).
authors.forename: Maria-Eleni
authors.initials: ME
authors.lastname: Ragoussi
authors.forename: Jun-Ho
authors.initials: JH
authors.lastname: Yum
authors.forename: Aravind Kumar
authors.initials: AK
authors.lastname: Chandiran
authors.forename: Mine
authors.initials: M
authors.lastname: Ince
authors.forename: Gema
authors.initials: G
authors.lastname: de la Torre
authors.forename: Michael
authors.initials: M
authors.lastname: Grätzel
authors.forename: Mohammad K
authors.initials: MK
authors.lastname: Nazeeruddin
authors.forename: Tomás
authors.initials: T
authors.lastname: Torres
keywords: dye-sensitized solar cells; energy conversion; phthalocyanines; steric effects; substituent effects