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Synthesis and characterization of CuZnSe2 nanocrystals in wurtzite, zinc blende and core-shell polytypes

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posted on 2020-01-29, 15:27 authored by Huan Ren, Miao Wang, Zhe Li, Fathima R. Laffir, Grace Brennan, Yuanwei Sun, Killian Stokes, HUGH GEANEYHUGH GEANEY, Emmet J. O'Reilly, Peng Gao, NING LIUNING LIU, Conor T. McCarthy, Kevin M. RyanKevin M. Ryan
CuZnSe2 (CZSe) is an important ternary semiconductor comprised of earth-abundant elements with a suitable bandgap for visible light absorption and structural/stoichiometric versatility that make it a promising candidate for photovoltaic applications. Here we report the controlled synthesis of the compound copper chalcogenide in nanocrystal form using a colloidal hot injection approach. Furthermore, we demonstrate control over the crystal phase to occur as either wurtzite (WZ) or zinc blende (ZB) as a function of the presence and absence of phosphine-based ligands. A major emission peak was observed at ∼1.7 eV using low-temperature photoluminescence (PL), ranging from 30 to 200 K. Additionally, we demonstrate the ability to extend this synthetic protocol to form a polytype structure comprised of a ZB core with a WZ shell.

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History

Publication

Chemistry of Materials;31 (24), pp. 10085-10093

Publisher

American Chemical Society

Note

peer-reviewed

Other Funding information

SFI, IRC, National Natural Science Foundation of China

Rights

© 2019 ACS This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work seehttp://dx.doi.org/10.1021/acs.chemmater.9b03063

Language

English

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