Effect of dye coverage on photo-induced electron injection efficiency in N719-sensitized nanocrystalline TiO2 films

Electron injection efficiency from N719 dyes to nanocrystalline TiO2 films is suppressed by the addition of tBP (4-tert-butylpyridine) and found that the effect of tBP was more pronounced for films with lower dye loading. This suggests that sensitizer dyes adsorbed densely onto the surface suppress the adsorption of tBP.