Which outcome occurs within dye-sensitized solar cells when injected electrons lack suitable orbital overlap?

💡 Explanation

When injected electrons lack suitable orbital overlap with TiO2 conduction states, interfacial charge transfer efficiency diminishes because quantum mechanical tunneling probability decreases with weaker orbital coupling, lowering the electron injection rate resulting in a drop in current. Therefore decreased short-circuit current density occurs, rather than voltage increase, redox enhancement, or conductivity boost due to different limiting factors.

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