Efficient monolithic dye sensitized solar cells with eco-friendly silica-titania spacer layers

• Type: Article in International Scientific Journal
• Date: 2019-03-14

Authors

Fátima Santos (Author) FEUP; Carolina Hora (Author) FEUP; Gabriel Bernardo (Author) FEUP; Dzmitry Ivanou (Author) FEUP; Adélio Mendes (Author) FEUP

Journal

Title: Solar Energy

Vol. 183

Pages: 419-424

ISSN: 0038-092X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 10 Citations

Other information

Authenticus ID: P-00Q-KS6

DOI: 10.1016/j.solener.2019.03.056

Abstract (EN): Monolithic assembly of dye-sensitized solar cells (M - DSSCs) is technologically attractive due to its ease of fabrication, compactness and lower production cost. However, combining cost-effective materials with high power conversion efficiency in M - DSSCs is still a challenging task. New silica-based spacer layers for M - DSSCs, derived from entirely water-based paste formulation were developed. A commercial aqueous suspension of SiO2 nanoparticles (LUDOX-40), modified with hydroxypropyl cellulose as a binder, were used for formulating the silica paste. The reflectance of the spacer layers was tuned by adding anatase nanoparticles; when 30 wt% of titania was added to the SiO2-TiO2 composite, a sharp increase of the reflectivity of the spacer layers was observed rendering a device with the highest to date reported power conversion efficiency of 8.3% and full stability. The effect of titania concentration in the SiO2 spacer layer on the photovoltaic performance, the spectral response of the photocurrent and recombination in M - DSSCs is discussed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6