http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jong Pil Park,Sin Kyu Kim,Jae-Young Park,옥강민,심일운 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.4
Highly polycrystalline copper indium diselenide (CuInSe2, CIS) thin films were deposited on glass or ITO glass substrates by two-stage metal organic chemical vapor deposition (MOCVD) at relatively mild conditions, using Cuand In/Se-containing precursors. First, pure Cu thin film was prepared on glass or ITO glass substrates by using a single-source precursor, bis(ethylbutyrylacetate)copper(II) or bis(ethylisobutyrylacetato)copper(II). Second, on the resulting Cu films, tris(N,N-ethylbutyldiselenocarbamato)indium(III) was treated to produce CuInSe2 films by MOCVD method at 400 oC. These precursors are very stable in ambient conditions. In our process, it was quite easy to obtain high quality CIS thin films with less impurities and uniform thickness. Also, it was found that it is easy to control the stoichiometric ratio of relevant elements on demands, leading to Cu or In rich CIS thin films. These CIS films were analyzed by XRD, SEM, EDX, and Near-IR spectroscopy. The optical band gap of the stoichiometric CIS films was about 1.06 eV, which is within an optimal range for harvesting solar radiation energy.
Jong Pil Park,Jea Young Park,Cha Hwan Hwang,최명호,Jee Eon Kim,옥강민,Ho-Young Kwak,심일운 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.2
LiCoO2, a cathode material for lithium rechargeable batteries, was prepared in a nanoscale through a simple sonochemistry. First, Co3O4 nanoparticles were prepared by reacting NaOH and CoCl2 or CoSO4 with a sonochemical method,operated at 20 kHz and 220 W for 20 min, which produces very powerful multibubble sonoluminescence conditions for chemical reactions. Second, LiOH was coated onto the Co3O4 nanoparticles by the same method as above. Finally, LiCoO2 nanoparticles of about 10 ~ 30 nm size in diameter were obtained by the thermal treatment of the resulting LiOHcoated Co3O4 nanoparticles at 500 oC for 3 hr. This synthetic process is relatively quite mild and simple compared to the known method for the synthesis of LiCoO2 nanoparticles. The materials synthesized were characterized by infrared spectroscopy, X-ray diffraction, inductively coupled plasma spectrometer, and high resolution-transmission electron microscopy analyses.
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.
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.
Preparation of ZnO Thin Films Using Zn/O-containing Single Precursor through MOCVD Method
Jong Pil Park,Sin Kyu Kim,Jae-Young Park,옥강민,심일운 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.1
A new Zn/O single source precursor, TMEDA-Zn(eacac)2, has been synthesized by using N, N, N’, N’-tetramethylethylendiamine (TMEDA), sodium ethyl-acetoacetate, and ZnCl2. From this organometallic precursor, ZnO thin films have been successfully grown on Si (100) substrates through the metal organic chemical vapor deposition (MOCVD) method at relatively mild conditions in the temperature range of 390~430 °C. The synthesized ZnO films have been found to possess average grain sizes of about 70 nm with an orientation along the c-axis. The precursor and ZnO films are characterized through infrared spectroscopy, nuclear magnetic resonance spectroscopy, EI-FAB-spectroscopy, elemental analyses, thermal analysis, X-ray diffraction, and field emission scanning electron microscopic analyses