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결정질 실리콘 태양전지의 Ag 촉매층을 이용한 나노 텍스쳐링 공정에 관한 연구
오병진,여인환,김민영,임동건,Oh, Byoung-Jin,Yeo, In-Hwan,Kim, Min-Young,Lim, Dong-Gun 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.1
In our report a relatively simple process for fast nano-texturing of p-type(100) CZ- silicon surface using silver catalyzed wet chemical etching in aqueous hydrofluoric acid (HF) and hydrogen peroxide solution($H_2O_2$) at room temperature. The wafers were saw-damaged by NaOH(6 wt%) at $60^{\circ}C$ for 150s. To obtain a nano-structured black surface, a thin layer of silver with thickness of 1 - 10 nm was deposited on the surfaces by evaporation system. After this process the samples were etched in HF : $H_2O_2$ : $H_2O$ = 1:5:10 at room temperature for 80s - 220s. Due to the local catalytic of the Ag clusters, this treatment results in the nano-scale texturing on the surface. This resulted in average reflectance values less than 9% after the silver on the surface of the wafers were removed.
급속 열처리 공정을 이용한 결정질 실리콘 태양전지의 전극 소결 최적화
오병진,여인환,임동건,Oh, Byoung-Jin,Yeo, In-Hwan,Lim, Dong-Gun 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.3
Limiting thermal exposure time using rapid thermal processing(RTP) has emerged as promising simplified process for manufacturing of solar cell in a continuous way. This paper reports the simplification of co-firing using RTP. Actual temperature profile for co-firing after screen printing is a key issue for high-quality metal-semiconductor contact. The plateau time during the firing process were varied at $450^{\circ}C$ for 10~16 sec. Glass frit in Ag paste etch anti-reflection layer with plateau time. Glass frit in Ag paste is important for the Ag/Si contact formation and performances of crystalline Si solar cell. We achieved 17.14% efficiency with optimum conditions.
발전설비 보일러 튜브 용접부의 잔여수명평가 신뢰성 향상을 위한 기계적 물성 변화 연구(SA213-T12)
오병진,장중순,Oh, Byungjin,Jang, Joong Soon 대한용접접합학회 2014 대한용접·접합학회지 Vol.32 No.3
Boiler equipment in power plant is always being operated in harsh conditions and severely exposed to the extreme environment of high temperature. Therefore periodically the state of devices should be checked, diagnosed, and analyzed to ensure the reliability of the equipment. Traditionally, such a diagnosis is based one or two physical properties of the sample taken from the equipment like hardness, microstructure, etc.. However, to enhance the confidence of the diagnosis, it is necessary to synthesize those properties together. This paper is to propose such a synthetic procedure for SA213-T12(1Cr-0.5Mo) which was developed to be used in $565^{\circ}C$ below condition. Creep test and accelerated degradation test were performed simultaneously, and the physical properties such as microstructure, tensile strength, yield strength, hardness, and indentation properties were measured. This paper proposes a method of determining the remaining life by quantitative comparison. It will provide the basis of evaluating life assessment more objective and reliable.
태권도 수련생들의 사회적 지지가 스포츠 자신감과 정신건강에 미치는 영향
오병진,최상원 한국스포츠학회 2018 한국스포츠학회지 Vol.16 No.3
본 연구는 태권도 수련생들의 사회적 지지가 스포츠 자신감과 정신건강에 어떠한 관계가 있는지를 규명하는 데 목적이 있으며, 이를 위해 블랙밸트센터 산하 태권도장 수련생들을 대상으로 편의추출법을 이용하여 401명의 자료를 실제 분석에 사용하였으며, SPSS 18.0을 이용하여 빈도분석, 확인적 요인분석, 신뢰도 분석, 상관관계 분석을 하였고 회귀분석을 통하여 변인 간의 인과적 관계를 규명하였다. 이상과 같은 연구방법과 검증을 기초로 하여 본 연구에서 도 출된 결과는 다음과 같다. 첫째, 사회적 지지가 스포츠 자신감에 미치는 영향을 분석한 결과, 코치와 부모 모두 능력입증, 코치지도력과 신체·정신적 준비에 정(+)적 영향을 미치는 것으로 나타났다. 둘째, 사회적 지지가 정신건강에 미치는 영향을 분석한 결과, 유의한 영향을 미치지 않는 것으로 나타났으나, 부모가 우울감에 부(-)적 영향을 미치는 것으로 나타났다. 셋째, 스포츠 자신감이 정신건강에 미치는 영향을 분석한 결과, 코치지도력이 우울감과 적대감에 정(+)적 영 향을 미치며, 신체·정신적 준비는 우울감과 적대감에 부(-)적 영향을 미치는 것으로 나타났다. 이상의 결과를 토대로 종합해 볼 때, 태권도 선수들의 사회적 지지가 스포츠 자신감에 영향을 미치고, 나아가 스포츠 자신감이 정신건강에 영 향을 미치는 것으로 판단할 수 있다. The purpose of this study is to investigate the relationship between social support of Taekwondo practitioners and sports self - confidence and mental health. For this purpose, 401 students were used for actual analysis using convenience extraction method for Taekwondo practitioners under the Black Belt Center and frequency analysis, confirmatory factor analysis, reliability analysis, and correlation analysis were performed using SPSS 18.0, and the causal relationship between variables was identified through regression analysis. Based on the above research method and verification, the results of this study are as follows. First, the results of analysis of the effect of social support on sport self - confidence showed that both coaches and parents had a positive influence on ability demonstration, coach’s leadership and physical and mental preparation. Second, the effects of social support on mental health were not significant, but it was found that parents had a negative effect on depression. Third, the analysis of the effect of sport self - confidence on mental health showed that coach leadership had a positive effect on depression and hostility, and physical and mental preparation had negative influence on depression and hostility. Based on the above results, it can be concluded that the social support of Taekwondo athletes affects sports self - confidence, and sports self - confidence affects mental health.