13 January 2017 Transparent conductive oxide-less back contact dye-sensitized solar cells using flat titanium sheet with microholes for photoanode fabrication
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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 ( H 2 O 2 ) surface treatments on FTS-MH have shown important factors to enhance the photoanode properties. H 2 O 2 surface treatment is able to change the surface morphology of FTS-MH, and the created anatase titanium dioxide ( TiO 2 ) nanostructures increase the surface contact between the FTS-MH and the coated mesoporous TiO 2 . Electrochemical impedance investigations reveled that improvements of the FTS - MH / TiO 2 and TiO 2 / 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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Azwar Hayat, Ajay Kumar Baranwal, Masaki Nakamura, Fujisawa Shigeki, Shyam S. Pandey, Tingli Ma, 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 . Submission: Received: 28 September 2016; Accepted: 22 December 2016
Received: 28 September 2016; Accepted: 22 December 2016; Published: 13 January 2017
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