Mobility and Decay Dynamics of Charge Carriers in One-Dimensional Selenium van der Waals Solid

Prashant Bhaskar, Alexander W. Achtstein, Silke L. Diedenhofen, Laurens D.A. Siebbeles

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
34 Downloads (Pure)

Abstract

Trigonal selenium is a semiconducting van der Waals solid that consists of helical atomic chains. We studied the mobility and decay dynamics of excess electrons and holes moving along the selenium chains. Excess charge carriers were generated by irradiation of powdered selenium with 3 MeV electron pulses. Their mobility and decay via trapping or recombination was studied by time-resolved microwave conductivity measurements as a function of temperature. The mobility of charge carriers along the Se chains is at least ca. 0.5 cm2·V-1·s-1 at room temperature. Charges decay predominantly by trapping at defects. The appreciable mobility, together with the potential for large-scale production of Se wires by liquid exfoliation, makes this material of great interest for use in nanoelectronics.

Original languageEnglish
Pages (from-to)18917-18921
Number of pages5
JournalThe Journal of Physical Chemistry C
Volume121
Issue number34
DOIs
Publication statusPublished - 31 Aug 2017

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