Ultralow surface recombination velocity in InP nanowires probed by terahertz spectroscopy
Joyce, Hannah J; Wong-Leung, Yin-Yin (Jennifer); Yong, Chaw Keong; Docherty, Callum J.; Paiman, Suriati; Gao, Qiang; Jagadish, Chennupati; Lloyd-Hughes, J; Herz, Laura; Johnston, Michael B; Tan, Hark Hoe
Using transient terahertz photoconductivity measurements, we have made noncontact, room temperature measurements of the ultrafast charge carrier dynamics in InP nanowires. InP nanowires exhibited a very long photoconductivity lifetime of over 1 ns, and carrier lifetimes were remarkably insensitive to surface states despite the large nanowire surface area-to-volume ratio. An exceptionally low surface recombination velocity (170 cm/s) was recorded at room temperature. These results suggest that...[Show more]
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