Nukunudompanich, Methawee

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Nukunudompanich, Methawee
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Nukunudompanich, Meethawee
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methawee.nu@kmitl.ac.th

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    Intermediate matching layer for light-induced performance and removable clip-on applications of four-terminal perovskite/silicon heterojunction tandem solar cells
    (2023-05-01)
    Sanglee, Kanyanee
    ;
    Sakunkaewkasem, Siwakorn
    ;
    Piromjit, Channarong
    ;
    Nukunudompanich, Methawee
    ;
    Kanjanaboos, Pongsakorn
    Perovskite/silicon tandem solar cells are one of the most efficient ways to improve the performance of the photovoltaic industry and should be viewed as a promising path in the photovoltaic field. The silicon photovoltaic modules have a lifespan of over 20 years, while the low device stability of perovskite solar cells (PSCs) remains a significant commercialization barrier. An air gap acts as an optical spacer layer for four terminal (4T) perovskite/silicon tandem cells, resulting in a loss of efficiency. Using polydimethylsiloxane (PDMS) as an intermediate matching layer (IML) and a clip-on design made of a PDMS-based material sandwiched between polyvinyl chloride (PVC) layers with the configuration of PVC/IML/PVC, this research not only achieved efficiency improvement of four-contact tandem solar cells but also greatly simplified disassembly of individual cells. The 4T perovskite/silicon heterojunction tandem cells with a clip-on design achieved the highest efficiency of 23.49% for the active area of 1 cm<sup>2</sup>, while the fully tandem configuration without a clip-on layer only exhibited a PCE of 22.83%. The clip-on technology has the potential to boost the current density of silicon heterojunction solar cells from 15.01 mA/cm<sup>2</sup> (for the filtered bottom cell with an air gap) up to 16.51 mA/cm<sup>2</sup> (for the filtered bottom cell with a clip-on). Therefore, this state-of-the-art allows for the removal of PSCs with a shorter lifespan while adhering two photovoltaic cells together securely and effectively.
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    Comparative analysis of anti-soiling coatings for PV modules in a tropical climate
    (2025-11-01)
    Sakarapunthip, Nattakarn
    ;
    Nukunudompanich, Meethawee
    ;
    Sittipunsakda, Oranoot
    ;
    Sangpongsanont, Yaowanee
    ;
    Chuangchote, Surawut
    The accumulation of dust on photovoltaic (PV) modules significantly reduces their efficiency, making anti-soiling coatings (ASCs) an essential solution. However, comprehensive comparisons of different ASC technologies under real-world conditions remain limited. This study systematically evaluates four ASC types (surfactant, hydrophilic-photocatalyst, hydrophilic-antistatic, and hydrophobic coatings) to assess their adhesion strength, durability, anti-soiling performance, and impact on PV energy output in a tropical environment. Surface morphologies and elemental compositions of ASCs were analyzed using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), while adhesion performance was examined through tape tests and contact angle measurements. The coatings were field-tested on PV modules in two distinct environments: a rooftop PV system near a mangrove area and a PV power plant near an agricultural zone, with data collected over both dry and rainy seasons. Results indicate that hydrophobic coatings exhibited the highest durability and anti-soiling efficiency, followed by hydrophilic-antistatic, hydrophilic-photocatalyst, and surfactant coatings. The hydrophobic coating also demonstrated the most significant improvement in PV energy output, making it the most effective long-term solution. Additionally, this study evaluates the environmental and economic feasibility of ASC application, highlighting the trade-offs between coating effectiveness and maintenance costs. These findings provide critical insights into selecting optimal ASC technologies for PV systems in high-soiling regions, bridging the gap between laboratory research and real-world performance.
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    Electrospinning of SnO2-TiO2nanofiber/nanorod composites for uses as electron transport layers in flexible perovskite solar cells
    (2024-05-17)
    Nukunudompanich, Methawee
    ;
    Roongraung, Kamonchanok
    ;
    Sanglee, Kanyanee
    ;
    Lekkla, Wassana
    ;
    Chuangchote, Surawut
    In perovskite solar cells (PSCs), the most commonly used electron transport layers (ETLs) are titanium dioxide (TiO2) and tin oxide (SnO2). The problem with SnO2 is that its conduction band does not match that of perovskites, while TiO2's photocatalytic nature can destroy perovskite materials. Additionally, these ETLs are typically applied in the form of nanoparticles. Electrospinning was used to produce composite nanofibers or nanorods of SnO2-TiO2 to improve the photovoltaic performance of flexible PSCs, which are required for flexible electronic devices. SnO2-TiO2 nanofibers or NRs as ETLs assist perovskites in harvesting light, separating excitons, extracting and collecting electrons, blocking holes, and preventing perovskites from decomposing and forming defects. PSCs containing SnO2-TiO2 nanoparticles have been produced. From the J-V characteristics of flexible-PSCs, the use of SnO2-TiO2 nanofibers improved the power conversion efficiency of the solar cells. A higher current density was obtained. This occurs because the 1D structure allows for more freely moving electrons. Comparing SnO2 nanoparticles and TiO2 nanofibers, an SnO2-TiO2 layer provides superior charge mobility and helps improve strength of the bonding at the perovskite/ITO interface. It is superior to SnO2 NPs and TiO2 nanofibers in reducing surface recombination.