The impact of non-uniform photogeneration on mass transport in dye-sensitised solar cells

Abstract

Redox mediator mass transport through mesoporous TiO2 was investigated, as a function of the photogeneration profile, using short-circuit photocurrent transients.

Hydrogel Electrolytes Based on Xanthan Gum: Green Route towards Stable Dye-Sensitized Solar Cells

“…Extracted charge measurements were performed by illuminating the cell under open-circuit (Qoc) or short-circuit (Qsc) conditions and then turning the lamp off. Then, the current was measured for a certain period and integrated to obtain the extracted charge [52][53][54]. The term "toolbox" indicates different photoelectrochemical techniques useful to investigate the properties of DSSCs under operating conditions [55].…”

The Effect of Illumination Direction and Temperature on Dye-Sensitized Solar Cells with Viscous Cobalt Complex-Based Electrolytes

“…When a negative potential is applied on the mesoporous TiO 2 electrode, it displays a high chemical capacity. In the forward scan this can lead to capacitive charging currents resulting in a net current that is a lower value than the steady-state current; in contrast, the capacitive discharge in the reverse scan can lead to a measured current larger than the steady-state current [20]. In the current case, the selected scan settings excluded that capacitive (dis)charge, which is the reason for the observed hysteresis in the J-V curves.…”

“…In recent work, we reported on the impact of non-uniform photogeneration in dye-sensitized solar cells with Co(bpy) 3 electrolyte [20]. The spatial photogeneration profile of both electrons Co(bpy) 3…”

“…The procedure for device fabrication has been described elsewhere [6,20,26,27]. The electrolyte consisted of 0.2 M Co(bpy) 3 (B(CN) 4 ) 2 , 0.1 M Co(bpy) 3 (B(CN) 4 ) 3 , 0.1 M LiTFSI and 0.2 M 4-tert-butylpyridine (TBP) in 3-methoxypropionitrile (MPN).…”

“…Electrochemical impedance spectroscopy (EIS) was measured using an Ivium Compactstat (Ivium technologies, Eindhoven, The Netherlands). Photocurrent turn-on transients and open-circuit voltage decay (OCVD) transients were measured using an in-house built system, which also is previously described elsewhere [20].…”