Silver doped TiO₂nano crystallites for dye-sensitized solar cell (DSSC) applications

Ruthenium (Ru) Doped Titanium Dioxide (P25) Electrode for Dye Sensitized Solar Cells

“…Various transition metals (Ag [19,20], Co [21], Mn [21], Zn [22], Cr [23], Nb [24], W [25], Cu [26], Y [27] and Sc [28]) have been used as dopant in TiO 2 . Ruthenium (Ru) appears to be a good dopant as the Ru 4+ ion has an ionic radius of 0.062 nm which is comparable to that of Ti 4+ ion (0.061 nm) [29].…”

Improved photovoltaic properties of dye sensitized solar cell by irradiations of Ni 2+ ions on Ag‐doped TiO 2 photoanode

“…The improved PCE is because of the introduction of conductive Ag-Ni metal clusters, which enhanced charge mobility. 21,31 The high value of FF for (1% Ag + Ni 2+ 4 × 10 14 ions/cm 2 )-TiO 2 provides evidence for reduced recombination process and PCE get enhanced. These results are in agreement with the UV-visible spectroscopy and XRD analysis because of the following reasons: (a) introduction of additional energy states in the forbidden band gap of TiO 2 narrowed its band gap, (b) Ag-Ni 2+ metal clusters provide the larger surface area for better performance for dye absorption, and (c) surface plasmon resonance effect.…”

“…This is attributed to the dopant molecules which increased the light absorption capability and offer a high photocurrent. 31,32 In Figure 4, all the photoanodes revealed a peak corresponding to absorption in the UV region. It has been observed that when Ag is doped in TiO 2 then the absorption peak shifted towards the longer wavelength and the intensity of peak has increased.…”

“…This is the reason why forward current increases when light from the ultraviolet region is irradiated. 31…”

Enhancing the efficiency of dye-sensitized solar cell by increasing the light trapping and decreasing the electron-hole recombination rate due to Ag@TiO2 core-shell photoanode structure

“…The V oc can be described as the difference between the quasi fermi level of free electrons of TiO 2 and the level of redox potential of the electrolyte. Therefore, V oc can be changed by a) band edge movement in TiO 2 , b) adjustment of the potential of the redox couple, and c) variation in recombination rate of injected electrons [32,[50][51][52]. So, as described in table 1 and figure 6, increase in V oc in presence of Ag@TiO 2 C-S with optimal values of 0.76 and 0.75 V for 1.0 and 0.6 wt% Ag, respectively, can be attributed to the upward quasi fermi level shift and resistance of electrons against recombination due to better condition in electron transport.…”