• Effect of a Polyethylene Terephthalate Film Buffer Layer on Electrode Interfacial Contact and Output Characteristics in Low-Temperature Integrated Solar Cell Module Packaging

    저온 일체화 태양전지 모듈 패키징에서의 PET film 완충층 구조가 전극 계면 접촉 및 출력 특성에 미치는 영향

    Sung Jun Cho, Min Gyu Kwak, Yong Joon Kwon, Seong Deok Seo, Sun Woo Yun, Woo Chang Song, Donggun Lim

    조성준, 곽민규, 권용준, 서성덕, 윤선우, 송우창, 임동건

    Low-temperature integrated packaging can reduce thermal stress and cell damage caused by conventional high-temperature interconnection. This study compared three wire attachment structures … + READ MORE
    Low-temperature integrated packaging can reduce thermal stress and cell damage caused by conventional high-temperature interconnection. This study compared three wire attachment structures using 60Sn40Pb solder-coated wires and then evaluated 60Sn40Pb and low-melting-point 40.5Sn58Bi1.5Ag solder-coated wires under the same polyethylene terephthalate film buffer-layer structure. Direct attachment to ethylene-vinyl acetate sheets caused wire deformation and lifting from finger electrodes because of thermal shrinkage, increasing interfacial contact resistance. Inserting a polyethylene terephthalate film between the sheet and wires suppressed deformation and enhanced compressive force during lamination. Consequently, module efficiency increased by approximately 10% compared with direct attachment. The 40.5Sn58Bi1.5Ag solder increased open-circuit voltage, short-circuit current, and maximum output power compared with 60Sn40Pb solder. Temperature-dependent analysis showed that sufficient solder melting and increased fill factor produced the highest module efficiency of 19.7% at 170°C. These results demonstrate that the film buffer layer improves interfacial contact stability and module output in low-temperature integrated packaging. - COLLAPSE
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    30 September 2026
  • Recent Trends in Interfacial Engineering for Enhancing the Efficiency and Stability of Perovskite Solar Cells

    페로브스카이트 태양전지의 효율 및 안정성 향상을 위한 계면 공학 동향

    Minseok Kim, HyeonOh Shin, Tae-Hyuk Kwon

    김민석, 신현오, 권태혁

    Perovskite solar cells (PSCs) have emerged as highly promising photovoltaic technologies owing to their remarkable power conversion efficiencies and solution-processable fabrication. However, … + READ MORE
    Perovskite solar cells (PSCs) have emerged as highly promising photovoltaic technologies owing to their remarkable power conversion efficiencies and solution-processable fabrication. However, despite their rapid progress, commercialization remains hindered by interfacial energy loss, non-radiative recombination, and insufficient operational stability, all of which are closely linked to the perovskite/hole-transport layer (HTL) interface. This review summarizes recent advances in organic HTL and interfacial engineering strategies for PSCs, with a focus on four key aspects: energy-level alignment, defect passivation, ion management, and self-assembled monolayer (SAM)-based interface design. Energy-level control promotes efficient hole extraction and reduces voltage loss, while defect passivation suppresses trap-assisted recombination at the buried interface. Ion-management strategies further improve stability by mitigating ionic accumulation and migration, and SAM-based HTLs provide molecularly defined platforms for dipole modulation and interfacial structural control. Collectively, these studies establish the HTL not merely as a charge-transport layer, but as a multifunctional interfacial platform that critically determines both the photovoltaic performance and long-term stability of PSCs. - COLLAPSE
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    30 September 2026
  • Corrosion Characteristics and Module Reliability Assessment of Floating Photovoltaic Systems in offshore Environments

    해상 환경 부유식 태양광 시스템의 부식 특성 및 모듈 신뢰성 평가

    Myenggil Gang, Seong Dae Kim, Alex Lim, Hyunsik Jo, Jieun Lee, Chang-Sub Won

    강명길, 김성대, 임민수, 조현식, 이지은, 원창섭

    This study presents a case analysis of corrosion effects and photovoltaic module reliability in floating photovoltaic (FPV) systems installed in harsh offshore … + READ MORE
    This study presents a case analysis of corrosion effects and photovoltaic module reliability in floating photovoltaic (FPV) systems installed in harsh offshore environments in South Korea. In collaboration with K-Water, a marine FPV test-bed was installed in 2021 at Saemangeum seawater lake to investigate the durability and operational stability of floating solar power systems under corrosive and mechanically demanding conditions. The environmental conditions included typhoon-induced wave heights of up to 2 m and wind speeds reaching 25 m/s. The modular raft-type floating system had a capacity of 100 kW and incorporated approximately 240 shingled 420 W photovoltaic modules. The study focused on both the atmospheric corrosion behavior of FPV structural materials and the occurrence of cell cracks in floating photovoltaic modules. To evaluate corrosion resistance, exposure tests were conducted on PosMAC (Zn-3%Mg-2.5%Al ternary alloy-coated steel), stainless steel, and aluminum in accordance with ISO 9223 and ISO 9226 standards. Corrosion grades and corrosion rates were assessed through periodic measurements conducted every three months over a one-year exposure period. Specimen holder units were designed to minimize specimen occlusion and prevent galvanic interference. After the exposure tests, corrosion products were removed using chemical cleaning procedures according to the metal type, and corrosion rates were determined by weight-loss measurements. In parallel, Electroluminescence (EL) testing was conducted twice during operation to analyze the generation and propagation of solar cell cracks. The results showed that some cracks remained stable in localized regions of the modules, whereas others progressively developed under mechanical stress and environmental loading conditions. The findings provide important insights into the corrosion characteristics of FPV structural materials and the mechanical durability of photovoltaic modules in marine environments. - COLLAPSE
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    30 September 2026
  • Solar Photovoltaic Asset Management Optimization: Performance Degradation Quantification and Policy Response Strategy

    태양광발전소 자산관리 최적화: 성능저하 정량화 및 정책 대응 전략 연구

    Jeonghak Yu, ChoonSung Kim, Byungwoo Park, Taesik Park

    유정학, 김춘성, 박병우, 박태식

    Korea’s photovoltaic (PV) sector has rapidly expanded since the mid‑2000s, but now faces a shift from installation‑centered growth to scientific asset management … + READ MORE
    Korea’s photovoltaic (PV) sector has rapidly expanded since the mid‑2000s, but now faces a shift from installation‑centered growth to scientific asset management under intensifying grid and policy constraints. This paper combines international PV degradation studies with long‑term Korean PV operation results to define realistic degradation scenarios and derive reliability‑centered maintenance (RCM) strategies. Based on Jordan and Kurtz’s meta‑analysis, crystalline silicon modules typically show 0.5–0.8%/year degradation, while Korean building‑attached and floating PV systems report roughly 10–20% cumulative loss over more than 10 years, depending on environment and maintenance quality. FMEA and RCM, following Stamatis and Arabian‑Hoseynabadi, are used to rank degradation drivers such as soiling, partial shading, contact faults, corrosion and inverter failures, indicating that targeted actions on top‑ranked modes can avoid a substantial portion of performance loss. Life‑cycle cost analysis grounded in RCM and predictive‑maintenance literature suggests that shifting from corrective and time‑based maintenance to condition‑based and AI‑assisted strategies can reduce O&M cost by about 20–40% and raise availability from roughly 85–90% to 95–99%. IoT‑based monitoring, machine‑learning‑based forecasting and digital twins are reviewed as key enablers for early fault detection, operation optimization and curtailment‑aware planning. Recent reports on Korean grid bottlenecks and curtailment, particularly in the Jeolla region, are finally used to build revenue‑risk scenarios, showing that maintaining annual degradation near 0.5–0.8% and reducing O&M cost by at least 20% are practical survival conditions for PV assets under rising curtailment and price volatility. - COLLAPSE
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    30 September 2026
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