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← ScienceWhich outcome results to an organic LED when bias weakens?
A)Exciton formation probability decreases greatly✓
B)Electron mobility rapidly increases instead
C)Injected hole concentration quickly rises
D)Radiative recombination efficiency gets higher
💡 Explanation
Exciton formation diminishes greatly because reduced bias provides less energy; therefore the weaker external electric field will inhibit electron–hole attraction and formation, rather than assisting charge carrier mobility or pushing radiative recomination by a different source.
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