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← ScienceWhich outcome occurs when a molecular crystal of an organic semiconductor is subjected to high pressure?
A)Band gap energy generally increases
B)Increased exciton diffusion length occurs
C)Intermolecular orbital overlap typically increases✓
D)Charge carrier mobility decreases sharply
💡 Explanation
Increased pressure enhances intermolecular interactions, causing enhanced orbital overlap because this reduces the overall electronic energy. This improves charge transport within grains; therefore, increased orbital overlap occurs, rather than decreased mobility or modified band structures caused by electronic transitions.
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