Photovoltaic Materials, Devices, and Technologies

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

[+] Author Affiliations
Azwar Hayat

Kyushu Institute of Technology, Graduate School of Life Science and Systems Engineering, 2-4 Hibikino, Wakamatsu-ku, Kitakyushzu-shi, Fukuoka 808-0196, Japan

Hasanuddin University, Department of Mechanical Engineering, Faculty of Engineering, Poros Malino KM. 6, Gowa, South Sulawesi 92171, Indonesia

Ajay Kumar Baranwal, Shyam S. Pandey, Tingli Ma, Shuzi Hayase

Kyushu Institute of Technology, Graduate School of Life Science and Systems Engineering, 2-4 Hibikino, Wakamatsu-ku, Kitakyushzu-shi, Fukuoka 808-0196, Japan

Masaki Nakamura, Fujisawa Shigeki

Ushio Inc., 2-6-1 Otemachi, Chiyoda-ku, Tokyo 100-8150, Japan

J. Photon. Energy. 7(1), 015501 (Jan 13, 2017). doi:10.1117/1.JPE.7.015501
History: Received September 28, 2016; Accepted December 22, 2016
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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 (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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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Azwar Hayat ; Ajay Kumar Baranwal ; Masaki Nakamura ; Fujisawa Shigeki ; Shyam S. Pandey, et al.
"Transparent conductive oxide-less back contact dye-sensitized solar cells using flat titanium sheet with microholes for photoanode fabrication", J. Photon. Energy. 7(1), 015501 (Jan 13, 2017). ; http://dx.doi.org/10.1117/1.JPE.7.015501


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