Structure-Property Relationship of New Organic Sensitizers Based on Multicarbazole Derivatives for Dye-Sensitized Solar Cells

Table 3

Performances of mercurochrome and organic dye based dye-sensitized solar cells and electron transport properties of their photoanodes as determined by impedance analysis. Cell areas are 0.24 cm².

Dyes	𝑅1 (Ω)^a	𝑅2 (Ω)^b	𝑅3 (Ω)^c	𝜏𝑒^d (ms)
C1A1	8.29	6.32	36.65	2.4
C2A1	7.41	5.1	19.71	3.5
C2S1A1	6.97	3.99	13.84	4.7

^a𝑅₁ is fluorine doped tin oxide interface resistance. ^b𝑅₂ is due to resistance at interface between counter electrode and electrolyte. ^c𝑅₃ possibly originated from backward charge transfer from TiO₂ to electrolyte and electron conduction in porous TiO₂ film. ^d𝜏 is lifetime of an electron in dye-sensitized solar cells.