Applications of P-Type NiO in Dye-Sensitized Solar Cells
This study investigates the applicability of p-type NiO in the working (or counter) electrode of a dye-sensitized solar cell (DSSC). The working electrode was designed and fabricated by depositing a film of TiO2/NiO composite particles, which were prepared by mixing the Ni powder with TiO2 particles using dry mixing method. The counter electrode was fabricated by depositing a NiO film on top of a Pt film, which has been deposited on a FTO glass using an ion-sputtering coater (or E-beam evaporator). This study shows that the power conversion efficiency of the DSSC with TiO2/NiO composite particles (3.80%) substantially exceeds that of the conventional DSSC (3.16%) due to the effects of the NiO barrier and the n-p junction. Aside from this, the power conversion efficiency of a DSSC with a Pt(E)/NiO counter electrode (4.28%) substantially exceeds that of a conventional DSSC with a Pt(E) counter electrode on which a Pt film was deposited using an E-beam evaporator. This result is attributed to the fact that the NiO film coated on the Pt(E) counter electrode improves the electrocatalytic activity of the counter electrode.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
T. L. Chiang et al., "Applications of P-Type NiO in Dye-Sensitized Solar Cells", Advanced Materials Research, Vols. 239-242, pp. 1747-1750, 2011