Transparent conductive oxide-less back contact dye-sensitized solar cells using flat titanium sheet with microholes for photoanode fabrication

Azwar Hayat; Ajay Kumar Baranwal; Masaki Nakamura; Fujisawa Shigeki; Shyam S. Pandey; Tingli Ma; Shuzi Hayase

doi:10.1117/1.JPE.7.015501

13 January 2017 Transparent conductive oxide-less back contact dye-sensitized solar cells using flat titanium sheet with microholes for photoanode fabrication

Azwar Hayat, Ajay Kumar Baranwal, Masaki Nakamura, Fujisawa Shigeki, Shyam S. Pandey, Tingli Ma, Shuzi Hayase

Author Affiliations +

Journal of Photonics for Energy, Vol. 7, Issue 1, 015501 (January 2017). https://doi.org/10.1117/1.JPE.7.015501

Abstract

A flat titanium sheet with microholes (FTS-MH) has been utilized to fabricate transparent conductive oxide-less dye-sensitized solar cells (TCO-less DSSCs) in back contact device architecture. Utilization of FTS-MH to fabricate a TCO-less photoanode offers several advantages in terms of simplicity and ease of fabrication as compared with the TCO-less DSSCs structure reported previously. Hydrogen peroxide (H2O2) surface treatments on FTS-MH have shown important factors to enhance the photoanode properties. H2O2 surface treatment is able to change the surface morphology of FTS-MH, and the created anatase titanium dioxide (TiO2) nanostructures increase the surface contact between the FTS-MH and the coated mesoporous TiO2. Electrochemical impedance investigations reveled that improvements of the FTS-MH/TiO2 and TiO2/dye/electrolyte interface led to hampered charge recombination resulting in enhancement of both short-circuit current density and open-circuit voltage, respectively. Even after removal of both TCO layers, our complete TCO-less DSSCs exhibited a power conversion efficiency of 7.25% under simulated solar irradiation.

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Azwar Hayat, Ajay Kumar Baranwal, Masaki Nakamura, Fujisawa Shigeki, Shyam S. Pandey, Tingli Ma, and Shuzi Hayase "Transparent conductive oxide-less back contact dye-sensitized solar cells using flat titanium sheet with microholes for photoanode fabrication," Journal of Photonics for Energy 7(1), 015501 (13 January 2017). https://doi.org/10.1117/1.JPE.7.015501

Received: 28 September 2016; Accepted: 22 December 2016; Published: 13 January 2017

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