Synthesis and Characterization of CuZnSe2 Nanocrystals in Wurtzite, Zinc Blende, and Core--Shell Polytypes

Hugh Geaney; Huan Ren; Miao Wang; Zhe Li; Fathima Laffir; Grace Brennan; Yuanwei Sun; Killian Stokes; Emmet J. O'Reilly; Peng Gao; Ning Liu; Conor McCarthy; Kevin M. Ryan

doi:10.1021/acs.chemmater.9b03063

Synthesis and Characterization of CuZnSe2 Nanocrystals in Wurtzite, Zinc Blende, and Core--Shell Polytypes

Hugh Geaney, Huan Ren, Miao Wang, Zhe Li, Fathima Laffir, Grace Brennan, Yuanwei Sun, Killian Stokes, Emmet J. O'Reilly, Peng Gao, Ning Liu, Conor McCarthy, Kevin M. Ryan

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English (Ireland)
Pages (from-to)	10085-10093
Number of pages	9
Journal	Chemistry of Materials
Volume	31
Issue number	24
DOIs	https://doi.org/10.1021/acs.chemmater.9b03063
Publication status	Published - 24 Dec 2019

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title = "Synthesis and Characterization of CuZnSe2 Nanocrystals in Wurtzite, Zinc Blende, and Core--Shell Polytypes",

abstract = "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.",

author = "Hugh Geaney and Huan Ren and Miao Wang and Zhe Li and Fathima Laffir and Grace Brennan and Yuanwei Sun and Killian Stokes and O'Reilly, {Emmet J.} and Peng Gao and Ning Liu and Conor McCarthy and Ryan, {Kevin M.}",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = dec,

day = "24",

doi = "10.1021/acs.chemmater.9b03063",

language = "English (Ireland)",

volume = "31",

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T1 - Synthesis and Characterization of CuZnSe2 Nanocrystals in Wurtzite, Zinc Blende, and Core--Shell Polytypes

AU - Geaney, Hugh

AU - Ren, Huan

AU - Wang, Miao

AU - Li, Zhe

AU - Laffir, Fathima

AU - Brennan, Grace

AU - Sun, Yuanwei

AU - Stokes, Killian

AU - O'Reilly, Emmet J.

AU - Gao, Peng

AU - Liu, Ning

AU - McCarthy, Conor

AU - Ryan, Kevin M.

PY - 2019/12/24

Y1 - 2019/12/24

N2 - 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.

AB - 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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U2 - 10.1021/acs.chemmater.9b03063

DO - 10.1021/acs.chemmater.9b03063

M3 - Article

AN - SCOPUS:85076740007

SN - 0897-4756

VL - 31

SP - 10085

EP - 10093

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 24

ER -

Synthesis and Characterization of CuZnSe2 Nanocrystals in Wurtzite, Zinc Blende, and Core--Shell Polytypes

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