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박명국(Park, Myoung-Guk),안세진(Ahn, Se-Jin),윤재호(Yoon, Jea-Ho),곽지혜(Gwak, Ji-Hye),김동환(Kim, Dong-Hwan),윤경훈(Yoon, Kyung-Hoon) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
A non-vacuum process for fabrication of CuIn_xGa_{1-x}Se₂ (CIGS) absorber layer from the corresponing Cu, In, Ga solution precursors was described. Cu, In, Ga precursor solution was prepared by a room temperature colloidal route by reacting the starting materials Cu(NO₃)₂, InCl₃, Ga(NO₃) and methanol. The Cu, In, Ga precursor solution was mixed with ethylcellulose as organic binder material for the rheology of the mixture to be adjusted for the doctor blade method. After depositing the mixture of Cu, In, Ga solution with binder on Mo/glass substrate, the samples were preheated on the hot plate in air to evaporate remaining solvents and to burn the organic binder material. Subsequently, the resultant CIG/Mo/glass sample was selenized in Se evaporation in order to get a solar cell applicable dense CIGS absorber layer. The CIGS absorber layer selenized at 530?C substrate temperature for 1h with various metal organic ratio.
Se 증발온도가 비진공 공정으로 제조한 CIS 광흡수층에 미치는 영향
박명국(Park, Myoung-Guk),안세진(Ahn, Se-Jin),윤재호(Yoon, Jea-Ho),윤경훈(Yoon, Kyung-Hoon) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.05
A non-vacuum process for fabrication of CuInSe₂ (CIS) absorber layer from the corresponding Cu, In solution precursors was described. Cu, In solution precursors was prepared by a room temperature colloidal route by reacting the starting materials Cu(NO₃)₂, InCl₃ and methanol. The Cu, In solution precursors were mixed with ethylcellulose as organic binder material for the rheology of the mixture to be adjusted for the doctor blade method. After depositing the mixture of Cu, In solution with binder on Mo/glass substrate, the samples were preheated on the hot plate in air to evaporate remaining solvents and to burn the organic binder material. Subsequently, the resultant CI/Mo/glass sample was selenized in Se evaporation in order to get a solar cell applicable dense CIS absorber layer. The CIS absorber layer selenized at 530?C substrate temperature for 30 min with various Se gas evaporation temperature was characterized by XRD, SEM, EDS.
김신호,박명국,김양도,Kim, Shin-Ho,Park, Myoung-Guk,Kim, Yang-Do 한국분말야금학회 2008 한국분말재료학회지 (KPMI) Vol.15 No.3
Elongated CdSe nanoparticles with a diameter of 3-7nm have been successfully synthesized using two surfactants of trioctylphospine (TOP) and hexadecylamine (HDA) at $160^{\circ}C$. The formation of elongated CdSe nanoparticles is possibly due to the cooperative effects from both the different binding capability of two surfactants (TOP and HDA) and intrinsically anisotropic crystal structure of the CdSe. The electron diffraction pattern of CdSe nanoparticles revealed the formation of wurzite phase. The CdSe samples showed red-shifted wavelength from 560 to 580nm with increasing the refluxing time due to the gradual growth of CdSe nanoparticles. The relatively broad absorption band can be attributed to the surface state of CdSe nanoparticles. The possible formation mechanism of elongated CdSe nanoparticles was proposed and the characteristics of CdSe have been discussed as well.
김신호(Kim, Shin-Ho),박명국(Park, Myoung-Guk),이보람(Lee, Bo-Ram),이현주(Lee, Hyun-Ju),김양도(Kim, Yang-Do) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
CdSe nanoparticles were prepared by chemical solution methods using CdCl₂{cdot}4H₂O (or Cd(NO₃)_ 2{cdot}4H₂O) and Na₂SeSO₃. The characteristics of CdSe nanoparticles were controlled by the react ion time, reaction temperature and reaction method as well as the surfactants. Cetyltrimethyl ammonium bromide(CTAB) was used as a capping agent to control the chemical reactions in aqueous solution. Polyvinylalcohol(PVA) was used as a templet in sono-chemical method. CdSe nanoparticles synthesized in aqueous solution showed homogeneous size distribution with relatively stable surface. CdSe nanoparticles synthesized in non-aqueous solution containing diethanolamine(DEA) showed the structure transformation from cubic to hexagonal as the reduction temperature increased from 80 to 160?C. Core shell CdSe was synthesized by sono-chemical method. Characteristics of CdSe nanoparticles were analyzed using transmission electron microscopy(TEM), x-ray photoelectron spectroscopy(XPS), x-ray diffraction(XRD), UV-Vis absorption spectra, fourier transform infrared spectroscopy(FT-IR) and photoluminescence spectra spectroscopy(PL). This paper presents simple routes to prepare CdSe nanoparticles for solar cell applications.