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Strong Carrier Lifetime Enhancement in GaAs Nanowires coated with Semiconducting Polymer

Yong, Chaw Keong; Noori, Keian; Gao, Qiang; Joyce, Hannah J; Jagadish, Chennupati; Giustino, Feliciano; Johnston, Michael B; Herz, Laura; Tan, Hark Hoe


The ultrafast charge carrier dynamics in GaAs/conjugated polymer type II heterojunctions are investigated using time-resolved photoluminescence spectroscopy at 10 K. By probing the photoluminescence at the band edge of GaAs, we observe strong carrier lifetime enhancement for nanowires blended with semiconducting polymers. The enhancement is found to depend crucially on the ionization potential of the polymers with respect to the Fermi energy level at the surface of the GaAs nanowires. We...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Nano Letters
DOI: 10.1021/nl3034027


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