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Jong Pil Park,이원영,Cha Hwan Hwang,Hanggeun Kim,김영권,심일운 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.8
Cu2SnSe3 (CTSe) and Cu2ZnSnSe4 (CZTSe) nanoparticles were synthesized by sonochemical reactions under multibubble sonoluminescence (MBSL) conditions. First, Cu2SnSe3 nanoparticles were synthesized by the sonochemical method with an 85% yield, using CuCl, SnCl2, and Se. Second, ZnSe was coated on the CTSe nanoparticles by the same method. Then, they were transformed into CZTSe nanoparticles of 5–7 nm diameters by heating them at 500 °C for 1 h. The ratios between Zn and Sn could be controlled from 1 to 3.75 by adjusting the relative concentrations of CTSe and ZnSe. With relatively lower Zn:Sn ratios (0.75–1.26), there are mostly CZTSe nanoparticles but they are believed to include very small amount of CTS and ZnSe particles. The prepared nanoparticles show different band gaps from 1.36 to 1.47 eV depending on the Zn/Sn ratios. In this sonochemical method without using any toxic or high temperature solvents, the specific stoichiometric element Zn/Sn ratios in CZTSe were controllable on demand and their experimental results were always reproducible in separate syntheses. The CZTSe nanoparticles were investigated by using X-ray diffractometer, a UV-Vis spectrophotometer, scanning electron microscope, Raman spectroscopy, and a high resolution-transmission electron microscope.
Park, Jongpil,Song, Miyeon,Jung, Won Mok,Lee, Won Young,Kim, Hanggeun,Kim, Youngkwon,Hwang, Chahwan,Shim, Il-Wun The Royal Society of Chemistry 2013 Dalton transactions Vol.42 No.29
<P>Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> (CZTS) nanoparticles were synthesized by sonochemical reactions under multibubble sonoluminescence (MBSL) conditions. First, Cu<SUB>2</SUB>SnS<SUB>3</SUB> (CTS) nanoparticles were synthesized by the sonochemical method with a 91.3% yield. Second, ZnS was coated on Cu<SUB>2</SUB>SnS<SUB>3</SUB> nanoparticles by the same method. Then, they were transformed into CZTS nanoparticles of 90–300 nm diameter by heating them at 450 °C for 1 hour. The ratios between Zn and Sn could be controlled from 0.20 to 1.32 by adjusting the relative concentrations of Cu<SUB>2</SUB>SnS<SUB>3</SUB> and ZnCl<SUB>2</SUB>. With relatively lower Zn : Sn ratios (0.20–0.41), there was a mixture of CTS and CZTS nanoparticles. The prepared nanoparticles show different band gaps from 1.19 to 1.52 eV depending on the zinc to tin ratio. In this sonochemical method without using any toxic or high temperature solvents, the specific stoichiometric element ratios in CZTS were controllable on demand and their experimental results were always reproducible in separate syntheses. The CZTS nanoparticles were investigated by using X-ray diffraction, a UV-Vis spectrophotometer, a scanning electron microscope, Raman spectroscopy, and a high resolution-transmission electron microscope.</P> <P>Graphic Abstract</P><P>Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> (CZTS) nanoparticles were synthesized by sonochemical reactions under multibubble sonoluminescence (MBSL) conditions. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3dt50849h'> </P>
Park, Jongpil,Lee, Won Young,Hwang, Cha Hwan,Kim, Hanggeun,Kim, Youngkwon,Shim, Il-Wun Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.8
$Cu_2SnSe_3$ (CTSe) and $Cu_2ZnSnSe_4$ (CZTSe) nanoparticles were synthesized by sonochemical reactions under multibubble sonoluminescence (MBSL) conditions. First, $Cu_2SnSe_3$ nanoparticles were synthesized by the sonochemical method with an 85% yield, using CuCl, $SnCl_2$, and Se. Second, ZnSe was coated on the CTSe nanoparticles by the same method. Then, they were transformed into CZTSe nanoparticles of 5-7 nm diameters by heating them at $500^{\circ}C$ for 1 h. The ratios between Zn and Sn could be controlled from 1 to 3.75 by adjusting the relative concentrations of CTSe and ZnSe. With relatively lower Zn:Sn ratios (0.75-1.26), there are mostly CZTSe nanoparticles but they are believed to include very small amount of CTS and ZnSe particles. The prepared nanoparticles show different band gaps from 1.36 to 1.47 eV depending on the Zn/Sn ratios. In this sonochemical method without using any toxic or high temperature solvents, the specific stoichiometric element Zn/Sn ratios in CZTSe were controllable on demand and their experimental results were always reproducible in separate syntheses. The CZTSe nanoparticles were investigated by using X-ray diffractometer, a UV-Vis spectrophotometer, scanning electron microscope, Raman spectroscopy, and a high resolution-transmission electron microscope.
Jong Pil Park,Miyeon Song,Won Mok Jung,Won Young Lee,Jin ho Lee,Hanggeun Kim,심일운 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.10
SnS thin films were deposited on glasses through metal organic chemical vapor deposition (MOCVD) method at relatively mild conditions, using bis(3-mercapto-1-propanethiolato) tin(II) precursor without toxic H2S gas. The MOCVD process was carried out in the temperature range of 300-400 °C and the average grain size in fabricated SnS films was about 500 nm. The optical band gap of the SnS film was about 1.3 eV which is in optimal range for harvesting solar radiation energy. The precursor and SnS films were characterized through infrared spectroscopy, nuclear magnetic resonance spectroscopy, DIP-EI mass spectroscopy, elemental analyses, thermal analysis, X-ray diffraction, and field emission scanning electron microscopic analyses.