Carrier generation mechanisms for photoconductivity in conjugated polymers

Hsin-Fei Meng, Tzay Ming Hong

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We study theoretically the origin of photoconductivity in conjugated polymers. The charge carriers are released when excitons dissociate through the deep levels within the semiconductor bandgap caused by either oxidation (carbonyl group) or structure defects. Our results explain the recent observations of the temperature-independent photocurrent in the sweep-out regime and the transient photocurrent at high excitation. The tightly bound exciton versus semiconductor band controversy on the photocarrier generation process is clarified.

Original languageEnglish
Pages (from-to)9913-9916
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number15
StatePublished - 1 Jan 2000

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