High performance of Pt-free dye-sensitized solar cells based on two-step electropolymerized polyaniline counter electrodes

Abstract

Two-step cyclic voltammetry approach is employed to prepare polyaniline nanofibers, which supplies a quick and controllable method to obtain polyanilines with short-branched structure to increase the active surface area.

Honeycomb-like polypyrrole/multi-wall carbon nanotube films as an effective counter electrode in bifacial dye-sensitized solar cells

“…Cyclic voltammetry (CV) is a powerful tool to investigate the CE's electrocatalytic activity [5,21]. In theory, the catalytic activity is positively correlated with the cathodic reduction peak current density, while it is negatively correlated with the peak separation between the anodic and cathodic peaks (E pp ) [39,40].…”

“…Carbon-based materials [8][9][10], metal sulfides [11][12][13][14][15], metal nitrides [16,17], and conducting polymers have been attempted to replace Pt catalyst in the DSSC [18][19][20][21][22]. Among them, the polypyrrole (PPy) thin film has been considered as one of the most promising CE materials due to its low cost and highly catalytic activity in the DSSC [23,24].…”

Efficiently cubic platinum-cobalt bimetallic nano-catalysts for use in low-cost dye-sensitized solar cells

“…Pt-free catalysts [8][9][10][11][12][13][14][15][16][17][18][19] or low-Pt [20][21][22] alloys have been expected to substitute for the conventional Pt CE in DSSCs. In especial, Pt alloying with relatively cheap transition metals (i.e.…”

Effective iron-molybdenum-disulfide counter electrodes for use in platinum-free dye-sensitized solar cells

“…, where J red is the peak current density, K represents the constant of 2.69×10 5 , A is the electrode area, C is the concentration of I 3 − species, n stands for the number of electrons, v is the scan rate, and D n is the diffusion coefficient [11]. As listed in Table 1, FeS 2 /MoS 2 has the highest D n value than other CEs, which demonstrates the FeS 2 /MoS 2 CE has the highest catalytic activity.…”

“…In the overall performance of DSSCs, the counter electrode (CE) is one of the crucial and indispensable components, because its functions are accelerating the triiodide/iodide (I 3 -/I -) reduction reaction and collecting electrons from external circuit [3]. The common strategy to reduce the cost of CE is seeking for low-cost substitutes to replace expensive platinum (Pt), such as Pt-metal alloys [4][5][6], carbon based materials [7,8], conducting polymers [9][10][11], and transition metal compounds [12][13][14][15][16][17].…”