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강명길,Gang, Myeong-Gil 한국방위산업진흥회 1994 國防과 技術 Vol.- No.179
국회에서의 국방예산안 심의과정에서는 예년에 비교할 수 없을 정도로 심층깊은 논의가 이루어졌을 뿐만 아니라 율곡예산에 대해서도 세부적인 질의와 검토가 이어짐으로써, 향후에는 예산소요에 대한 명확한 근거와 논리가 뒷받침되지 않고는 적정수준의 국방비 획득이 결코 용이하지 않을 것임을 예고하였다.
열처리 시 S/Se 분말 비율에 따른 Cu<sub>2</sub>ZnSnSe<sub>4</sub> (CZTSSe) 박막의 합성 및 특성 평가
강명길,홍창우,김진혁,Gang, Myeng Gil,He, Ming Rui,Hong, Chang Woo,Kim, Jin Hyeok 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.4
$Cu_2ZnSn(S_xSe_{1-x})_4$ (CZTSSe) absorber thin films were prepared on Mo coated soda lime glass substrates by sulfo-selenization of sputtered stacked Zn-Sn-Cu precursor thin films. The Zn-Sn-Cu precursor thin films were sulfo-selenized inside a graphite box containing S and Se powder using rapid thermal processing furnace at $540^{\circ}C$ in Ar atmosphere with pre-treatment at $300^{\circ}C$. The effect of different S/Se ratio on the structural, compositional, morphological and electrical properties of the CZTSSe thin films were studied using XRD (X-ray diffraction), XRF (X-ray fluorescence analysis), FE-SEM (field-emission scanning electron microscopy), respectively. The XRD, FE-SEM, XRF results indicated that the properties of sulfo-selenized CZTSSe thin films were strongly related to the S/Se composition ratio. In particular, the CZTS thin film solar cells with S/(S+Se)=0.25 shows best conversion efficiency of 4.6% ($V_{oc}$ : 348 mV, $J_{sc}$ : $26.71mA/cm^2$, FF : 50%, and active area : $0.31cm^2$). Further detailed analysis and discussion for effect of S/Se composition ratio on the properties CZTSSe thin films will be discussed.