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Optical and electrical properties of wurtzite copper indium sulfide nanoflakes

Lookup NU author(s): Dr Stevin Pramana

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Abstract

Raman spectroscopic analysis and Hall measurement of wurtzite copper indium sulfide (CuInS2) were carried out. Nanocrystalline wurtzite CuInS2 (CIS) was synthesized by a solvothermal reaction route for these studies. It is observed that the amount of sulfur source, time and temperature of the reaction are the key to control wurtzite phase formation of CuInS2. Wurtzite nanoflakes were formed at 150 °C, with ethylenediamine as the selected solvent and the ratio of Cu:In:S precursor was kept at 1.1:1:5. The Hall measurement resulted in sheet resistivity, °, of ~2 × 105 Ω/sq, Hall coefficient of ~10 m2/C, mobility of ~0.5 cm2/V-s and hole concentration of ~7×1013/cm2. Slight shift in the Raman spectra of 1-2 cm-1 was observed between wurtzite and roquesite CuInS2 and was attributed to the stoichiometric variation in Cu/In and/or changes in the chemical environments of the two crystal structures. © 2012 by American Scientific Publishers. All rights reserved.


Publication metadata

Author(s): Ho JCW, Batabyal SK, Pramana SS, Lum J, Pham VT, Li D, Xiong Q, Tok AIY, Wong LH

Publication type: Article

Publication status: Published

Journal: Materials Express

Year: 2012

Volume: 2

Issue: 4

Pages: 344-350

Print publication date: 01/12/2012

ISSN (print): 2158-5849

ISSN (electronic): 2158-5857

Publisher: American Scientific Publishers

URL: https://doi.org/10.1166/mex.2012.1091

DOI: 10.1166/mex.2012.1091


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