INVESTIGADORES
OTERO Luis Alberto
congresos y reuniones científicas
Título:
SENSITIZATION OF WIDE BAND GAP OXIDE SEMICONDUCTOR BY FLUORENE BRIDGED DONOR/ACCEPTOR DYE
Autor/es:
MIGUEL GERVALDO; LORENA MACOR; DANIEL HEREDIA; KEN-TSUNG WONG; LUIS OTERO; FERNANDO FUNGO
Lugar:
La Serena
Reunión:
Encuentro; X Encuentro Latinoamericanos de Fotoquímica; 2010
Institución organizadora:
ELAFOT
Resumen:
In this study we synthesized and characterized the bipolar dye SSD2 featuring two diphenylamino (DPA) groups as donors and a 2-cyanoacrylic acid unit as acceptor, with a fluorene bridge ensuring efficient DA interactions. This novel dye possesses several unique features that are potential advantages for application in DSSCs. For example, SSD2 is composed of two D branches in a molecular structure, which not only increases the light absorption efficiency but also minimizes dye aggregation. The frontier molecular orbitals revealed that the highest occupied molecular orbital (HOMO) of SSD2 is localized mostly on the diphenylamino groups, whereas the lowest unoccupied molecular orbital (LUMO) is localized on the cyanoacrylic acid units. The energy levels revealing that both, electron injection into TiO2 from the dyes excited states and dye reduction by the redox couple are exothermic, making DSSC operation feasible.
