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← ScienceWhich outcome occurs when applying an electric field on dye-sensitized TiO2 solar cells?
A)Increased electron-hole recombination rate
B)Enhanced electron injection efficiency✓
C)Suppressed electron diffusion coefficient
D)Reduced electrolyte penetration velocity
💡 Explanation
Enhanced electron injection efficiency occurs because the applied electric field reduces the energy barrier, allowing electrons in the excited dye LUMO to more readily tunnel into the TiO2 conduction band; therefore, dye regeneration proceeds efficiently, rather than electron-hole recombination dominating.
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