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Which outcome reduces dye-sensitized solar cell efficiency by altering electron movement between TiO2 orbitals?

A)Increased surface plasmon resonance
B)Enhanced Förster resonance energy transfer
C)Accelerated electron-hole recombination
D)Improved quantum confinement effects

💡 Explanation

Accelerated electron-hole recombination diminishes efficiency because the mechanism *non-radiative decay* within the involved TiO2 orbitals causes direct electron transitions back to the oxidized dye. Therefore, generated electrons cannot reach the external circuit, rather than contributing to power generation.

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