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Title: Optical and electrical properties of Wurtzite copper indium sulfide nanoflakes
Authors: Ho, John C. W.
Batabyal, Sudip Kumar
Pramana, Stevin S.
Lum, Jiayi
Pham, Viet T.
Li, Dehui
Xiong, Qihua
Wong, Lydia Helena
Tok, Alfred Iing Yoong
Keywords: DRNTU::Engineering::Materials
Issue Date: 2012
Source: Ho, J. C. W., Batabyal, S. K., Pramana, S. S., Lum, J., Pham, V. T., Li, D., Xiong, Q., Tok, A. I. Y., Wong, L. H., et al. (2012). Optical and Electrical Properties of Wurtzite Copper Indium Sulfide Nanoflakes. Materials Express, 2(4), 344-350.
Series/Report no.: Materials express
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, ρ, of ~2x105 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.
DOI: 10.1166/mex.2012.1091
Rights: © 2012 American Scientific Publishers
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles


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