• Role and Design Strategies of NiOx Hole Transport Layers in High Performance Perovskite Solar Cells

    페로브스카이트 태양전지 효율향상을 위한 NiOx 홀 수송층의 역할과 설계 전략

    Jaewon Jang, Jaeyeon Kim, Bonkee Koo, Min Jae Ko

    장재원, 김재연, 구본기, 고민재

    Perovskite solar cells (PSCs) have emerged as one of the most promising photovoltaic technologies, achieving power conversion efficiencies (PCEs) exceeding 26%. Among … + READ MORE
    Perovskite solar cells (PSCs) have emerged as one of the most promising photovoltaic technologies, achieving power conversion efficiencies (PCEs) exceeding 26%. Among the materials used in PSCs, nickel oxide (NiOx) has become a key component for hole transport layers (HTLs) in p-i-n structured devices due to its chemical stability, suitable p-type characteristics, wide optical bandgap, and cost-effectiveness. These properties make NiOx essential for efficient charge transport, reduced recombination losses, and enhanced device stability. Recent research has focused on improving the morphology, crystallinity, and photovoltaic performance of NiOx thin films through advanced fabrication techniques such as sol-gel processing, chemical precipitation, sputtering, and pulsed laser deposition. Interface engineering strategies have also been explored to optimize energy band alignment and mitigate recombination at the NiOx/perovskite interface. Despite these advancements, challenges such as scalability and long-term operational stability remain significant barriers to commercialization. This review critically examines recent progress in NiOx-based HTLs, addressing both technical advancements and persistent challenges. By providing insights into the structural and photovoltaic properties of NiOx, this study aims to support the development of scalable, high-performance PSCs and contribute to their integration as sustainable energy solutions. - COLLAPSE
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    30 June 2025
  • Tin-Lead Perovskite Solar Cells Incorporating Tin-Lead Perovskite Quantum Dots for Enhancing Photovoltaic Performance

    주석-납 양자점을 활용한 주석-납 페로브스카이트 태양전지의 효율 향상 기술

    ChaeEun Lee, Dohun Baek, Hyemi Na, Min Kim

    이채은, 백도훈, 나혜미, 김민

    Tin-lead (Sn-Pb) perovskite solar cells have garnered significant attention as a next-generation photovoltaic technology due to their ideal bandgap, reduced toxicity, and … + READ MORE
    Tin-lead (Sn-Pb) perovskite solar cells have garnered significant attention as a next-generation photovoltaic technology due to their ideal bandgap, reduced toxicity, and high efficiency. However, issues such as tin oxidation and interfacial defects between the perovskite and electron transport layers (ETLs) hinder their performance and stability. In this study, Sn-Pb perovskite quantum dots (QDs) were introduced as surface passivation layers to address these challenges. The QDs were applied onto the perovskite layer and subsequently treated with isopropanol (IPA) to control the layer thickness and remove surface ligands. This approach effectively optimized the interfacial structure, reduced defect density, and suppressed tin oxidation, leading to decreased leakage current and a notable increase in open-circuit voltage (Voc). Characterization techniques, including UV-Vis spectroscopy, XRD, and SEM, confirmed that QD treatment did not alter the structural integrity or bandgap of the perovskite films. Dark current analysis revealed a reduction in J0​, and photovoltaic measurements demonstrated an improvement in power conversion efficiency (PCE) from 16.2% for the control device to 20.4% for the QD-treated device. These results underscore the effectiveness of QD-based surface passivation in enhancing both the efficiency and stability of Sn-Pb perovskite solar cells. - COLLAPSE
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    30 June 2025
  • A Comprehensive Guide to Performance Measurement of Monolithic Perovskite/Silicon Tandem Solar Cell Technologies
    Seungun Lee, Eunseo Noh, Seungkyu Ahn, Sang Il Seok
    Perovskite/silicon tandem solar cells are a promising next-generation photovoltaic technology capable of surpassing the efficiency limits of single-junction silicon cells. By combining … + READ MORE
    Perovskite/silicon tandem solar cells are a promising next-generation photovoltaic technology capable of surpassing the efficiency limits of single-junction silicon cells. By combining the complementary light absorption of perovskite and silicon, these tandem devices can achieve power conversion efficiencies (PCE) approaching 35%. Practical application, however, demands precise spectral control and accurate performance evaluation to overcome current matching and perovskite material challenges. This report introduces an integrated strategy to improve performance assessment through LED-based spectral tuning and advanced measurement methodologies. - COLLAPSE
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    30 June 2025
  • Facile Patterning Process for Halide Perovskite Thin Films Using Photo-Induced Decomposition

    광분해를 이용한 할라이드 페로브스카이트 박막의 패터닝 공정

    Yun Mo Kang, Won Chang Choi, Howon Jeong, Sangwook Lee

    강윤모, 최원창, 정호원, 이상욱

    In this study, we present a simple and cost-effective patterning process for perovskite thin films using photo-induced decomposition. Using methylammonium lead iodide … + READ MORE
    In this study, we present a simple and cost-effective patterning process for perovskite thin films using photo-induced decomposition. Using methylammonium lead iodide (MAPbI3) as a model material, we demonstrate that exposure to a halogen lamp light through a shadow mask selectively decomposes the exposed regions into MAI and PbI2, while the masked regions remain intact. Subsequent immersion in isopropyl alcohol (IPA) selectively dissolves MAI, leaving behind PbI2 as an insulating layer. The patterned MAPbI3 films retained their original crystal structure and optical properties. This method was applied to fabricate MAPbI3-based resistive switching device arrays, successfully demonstrating ON/OFF operations under applied voltages. By utilizing the perovskite film itself as a photoresist and IPA as a developer, this approach eliminates the need for conventional photolithography chemicals and equipment, enhancing its practicality and scalability. With further refinement, this technique has the potential to significantly advance the development of perovskite-based semiconductor devices. - COLLAPSE
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    30 June 2025
  • A Study on Experimental Evaluation of BIPV Color Film-Based Lightweight Modules for Implementing Zero Energy Buildings

    제로에너지건축물 구현을 위한 BIPV 컬러 필름 기반 경량 모듈의 실증 평가 연구

    Da Yeong Jun, Hyunsoo Lim, Sung Hyun Kim

    전다영, 임현수, 김성현

    The transition to Zero Energy Buildings (ZEB) is actively promoted as part of the carbon neutrality policy. Accordingly, Building-Integrated Photovoltaic (BIPV) systems, … + READ MORE
    The transition to Zero Energy Buildings (ZEB) is actively promoted as part of the carbon neutrality policy. Accordingly, Building-Integrated Photovoltaic (BIPV) systems, which can be directly applied to building exteriors, have been gaining. This study evaluates the power generation performance of lightweight color film modules under outdoor conditions. BIPV modules were installed in a south-facing curtain wall structure in Gyeongsan-si, south Korea. Bi-facial cells were half-cut using the NDC method, and 12 half-cells were connected using a multi-busbar interconnection method to form strings, with a film-to-film structure. The monitoring system collected DC and AC output data every minute to analyze cumulative power generation. Solar irradiance at 90° and 25° angles was measured to assess the correlation between irradiance and module output, and module and ambient temperatures were monitored to evaluate temperature-dependent power variations. As a result, the film modules maintained a performance ratio above 80% on clear days (cloud cover less than 2) throughout the measurement period, indicating stable power generation. - COLLAPSE
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    30 June 2025
  • Recent Trends of Photoelectrochemical Water Splitting to Produce Clean Hydrogen

    청정 수소 생산을 위한 PEC 물 분해 연구 동향

    Chanmin Jo, Dong Kyu Lee, Uk Sim

    조찬민, 이동규, 심욱

    The production of clean hydrogen represents a significant challenge in the context of efforts to reduce carbon emissions and facilitate the transition … + READ MORE
    The production of clean hydrogen represents a significant challenge in the context of efforts to reduce carbon emissions and facilitate the transition to sustainable energy sources. Among these various methods, hydrogen production through Photo-electrochemical (PEC) water splitting is regarded as a promising technology, as it employs solar energy to decompose water and generate hydrogen in an environmentally friendly method. To optimize the efficiency of PEC water splitting, it is crucial to select and design photoelectrodes and catalysts that are central to the reaction. PEC water splitting is a process that converts solar energy into electrical energy, facilitating the electrochemical breakdown of water into oxygen (O2) and hydrogen (H2). The formation of heterostructures, the application of nanomaterials, and the use of photoelectrode coatings have all been shown to significantly improve charge separation and light absorption efficiency. Additionally, catalyst surface modifications and integration have been demonstrated to suppress charge recombination and promote water oxidation reactions, thereby enhancing the characteristics and performance of PEC water splitting. These findings suggest the potential for developing high-efficiency, stable PEC systems and provide a path forward for advancing clean hydrogen production. - COLLAPSE
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    30 June 2025
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