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Donghyun Oh(오동현),Junsin Yi(이준신) 한국신재생에너지학회 2021 한국신재생에너지학회 학술대회논문집 Vol.2021 No.7
The electrode is formed as the last process of the solar cell device and affects the characteristics. Ag paste for crystalline silicon solar cells, such as p-PERC and TOPCon structures, penetrates the anti-reflection film during the electrode formation process, and glass frit for contact with the emitter layer is added, and it is processed at a high temperature of 700~800℃. On the other hand, since the crystalline silicon-based heterojunction solar cell is in contact between the TCO layer and the electrode, the Ag paste for forming the electrode does not require a glass frit, and the process temperature when forming each layer is 200℃, so the low temperature Ag paste must be used. The low-temperature Ag paste is difficult to form fine line width electrode due to the problem of viscoelasticity, and the adhesion properties on the surface are not good. In this study, electrodes of fine line width were formed and the adhesion and electrical properties of the electrodes formed according to the curing conditions were analyzed.
캐패시터 열화를 이용한 전장품 가속시험 단축 시험법 개발 및 유효성 검증
오동현(Donghyun Oh) 한국자동차공학회 2024 한국자동차공학회 부문종합 학술대회 Vol.2024 No.6
With the development of autonomous driving of automobiles, auto parts the help autonomous driving are also rapidly being developed. Due to the rapid development process and frequent design changes caused by complex electrical equipments, it is becoming increasingly difficult to proceed with Design Validation in line with customer requirements and improvement product application schedules. Therefore, in this paper, a reducing test duration method was presented according to the accelerated life theory for three types of test with the longest test was verified by obtaining failure date through the deterioration of the aluminum electrolytic capacitor actually mounted on the evaluation product.
오동현(Oh Donghyun),유현준(Yoo Hyunjoon) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Typically, a public housing estate has been had a uniform plan like a city, estate and housing unit. The purpose of this study was to design the new public housing estate through an intermediation to communicate between city, estate and housing unit. As analyzing the housing type through references about intermediation space and antecedent studies about public housing estate, we draw up plans for an extension to the space by using an intermediation. In the 1960s, housing shortage was happened by the economic growth and population growth so that the public housing estate with the bulk housing type has been suggested. A public housing estate showed a disconnection between city space and life space because the public housing estate has set up the only life space without consideration of outside conditions (situations). Thus, the change of the public housing estate is required. In this study, we proposed the new housing space that is possible to communication between life space and city.
결정질 실리콘 태양전지 Ag 전극의 소결 조건에 따른 특성 분석
오동현(Donghyun Oh),김태용(Taeyong Kim),김영국(Youngkuk Kim),이준신(Junsin Yi) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.10
태양전지의 전극은 가장 마지막 공정으로 태양전지의 효율에 큰 영향력을 끼치는 중요한 역할을 한다. 결정질 실리콘 태양전지에서 전극은 건조와 소성 과정을 걸쳐 반사방지막을 뚫고, 이미터와 접촉하여 우수한 전기적 특성을 보이게 된다. 본 연구에서는 결정질 실리콘 태양전지의 전극을 스크린 프린팅 방식으로 형성하고, 소성 온도와 벨트 속도를 변경하여 전기적 특성 분석을 진행했다.
김영국 ( Youngkuk Kim ),오동현 ( Donghyun Oh ),박진주 ( Jinjoo Park ),이준신 ( Junsin Yi ) 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.4
본 논문은 대학연구실과 산업현장에서 태양전지를 연구 개발하는 초년생들이 태양전지 성능 분석하는 데 있어 가장 기본적이면서도 중요한 양자효율(quantum efficiency) 측정, 분석 방법에 이해를 돕는 것을 목적으로 한다. 양자효율의 정의를 시작으로, 측정 방법, 분석 방법에 대한 자세한 소개와 함께 태양광 스펙트럼으로부터 태양전지 소재의 밴드 갭에 따른 이론적인 전류밀도를 계산하고, 이론적인 전류밀도와 양자효율 측정, 분석을 통해 태양전지의 성능을 분석하는 방법에 대해 깊이 있게 논의한다. 태양전지의 양자효율 측정 분석은 태양전지를 깊이(전면, bulk, 후면)에 따라 분석할 수 있어 태양전지 성능 분석에 직관을 줄 수 있는 매우 유용한 방법이다. 이론적 전류밀도와 양자효율 측정 분석에 대한 깊은 이해로 태양전지를 연구하는 학생과 연구원들이 태양전지의 성능 분석을 하는 데 있어 기반으로 활용할 수 있기를 기대한다. The purpose of this paper is to help those who research and develop solar cells in university laboratories and industrial sites understand the most basic and important quantum efficiency measurement and analysis method in analyzing solar cell performance. Starting with the definition of quantum efficiency, we calculate the theoretical current density according to the band gap of the solar cell material from the solar spectrum, along with a detailed introduction to the measurement and analysis methods, and measure and analyze the theoretical current density and quantum efficiency. We discuss in depth how to analyze the performance of solar cells through Quantum efficiency measurement and analysis of solar cells is a very useful method that can give intuition to solar cell performance analysis as it can analyze solar cells according to depth (front emitter, bulk, rear surface). Students and researchers who study solar cells with a deep understanding of theoretical current density and quantum efficiency measurement analysis are expected to use it as a basis for analyzing solar cell performance.