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Which excited-state consequence occurs when organic semiconductors degrade?

A)Increased singlet exciton fission efficiency
B)Lowered triplet-triplet annihilation rates
C)Appearance of mid-gap trap states
D)Augmented charge carrier mobility

💡 Explanation

The formation of mid-gap trap states results from disruption of molecular orbitals upon degradation because oxidative processes introduce defects, leading to localized electronic states within the band gap and reduced luminescence, therefore diminishing the original semiconducting properties rather than enhancing carrier transport.

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