Impedance characterization of dye-sensitized solar cells in a tandem arrangement for hydrogen production by water splitting

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Andrade, L (Autor) Outra; Cruz, R (Autor) Outra; Ribeiro, HA (Autor) Outra; Adélio Mendes (Autor) FEUP

Revista

Título: International Journal of Hydrogen Energy

Vol. 35

Páginas: 8876-8883

ISSN: 0360-3199

Editora: Elsevier

Indexação

ISI Web of Knowledge - 32 Citações

ISI Web of Science

Scopus - 37 Citações

COMPENDEX

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-003-3G6

DOI: 10.1016/j.ijhydene.2010.06.020

Abstract (EN): The present work reports the photoelectrochemical characterization of a dye-sensitized solar cell (DSC) to assist water split in a photoelectrochemical (PEC) cell. Performance parameters were extracted from standard current-voltage characteristic (I-V) and the charge transfer phenomena occurring at different interfaces of the DSC were evaluated by electrochemical impedance spectroscopy (EIS). The DSC comprised the N719 dye and a robust electrolyte (1-propyl-3-methylimidazolium iodide in guanidinium thiocyanate additive). At 1 sun illumination the DSC yielded a short-circuit photocurrent density of 14.9 mA cm(-2), an open-circuit voltage of 0.797 V, a fill factor of 0.712 and an overall efficiency of 8.5%. Different PEC systems based on silicon-doped and undoped hematite photoelectrodes were considered. The required additional anodic bias necessary for actual water cleavage was supplied by two DSCs in series operating just under open-circuit voltage (1.56 V), allowing a conversion efficiency of about 1.12% for the silicon-doped hematite deposited by APCVD, 0.51% for the silicon-doped prepared by USP and 0.12% for the undoped hematite sample.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8