Which effect is observed when conjugated polymer molecules absorb light at resonant frequency?

💡 Explanation

When light hits a conjugated polymer at a resonant frequency, exciton formation (bound electron-hole pair) occurs due to photoexcitation which promotes an electron to higher energy levels leaving behind a hole. Therefore charge separation results, rather than band gap widening, vibrational increase, or increased ionization which involve fundamentally different chemical processes.

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