Peripherally and axially carboxylic acid substituted subphthalocyanines for dye-sensitized solar cells.
A series of subphthalocyanines (SubPcs) bearing a carboxylic acid group either at the peripheral or axial position have been designed and synthesized to investigate the influence of the COOH group positions on the dye-sensitized solar cell (DSSC) performance. The DSSC devices based on SubPcs with axially substituted carboxylic acid groups showed low photovoltaic performance, whereas peripherally substituted one exhibited higher power conversion efficiency owing to improved injection from LUMO of SubPcs to the TiO2 conduction band.
Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid (Spain), Fax: (+34) 914973966.
Mine
M
Ince
Anaïs
A
Medina
Jun-Ho
JH
Yum
Aswani
A
Yella
Christian G
CG
Claessens
M Victoria
MV
Martínez-Díaz
Michael
M
Grätzel
Mohammad K
MK
Nazeeruddin
Tomás
T
Torres
dye-sensitized solar cells; photosensitizers; porphyrinoids; subphthalocyanines