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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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    Comparison of PV estimation model with measured PV power output
    (2017-10-19)
    Kittisontirak, Songkiate
    ;
    Niemcharoen, Surasak
    ;
    Titiroongruang, Wisut
    ;
    Limmanee, Amornrat
    ;
    Sitthiphol, Nopphadol
    This paper describes a comparison of proposed model with simulation software and measurement data of PV power plant in Cambodia. The proposed model is based on behavior of PV module at a particular site. The parameters which affected to PV power output as solar irradiance and module temperature were used as input in this model. Weight function technics were used to improve accuracy of single diode five parameters (1D5P). It was found that the proposed model can improve the accuracy of PV power output estimation model.
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    Development of thin film a-SiO:H/a-Si:H double-junction solar cells and their temperature dependence
    (2013-11-01)
    Sriprapha, Kobsak
    ;
    Hongsingthong, Aswin
    ;
    Krajangsang, Taweewat
    ;
    Inthisang, Sorapong
    ;
    Jaroensathainchok, Suttinan
    Hydrogenated amorphous silicon oxide (a-SiO:H)/hydrogenated amorphous silicon (a-Si:H) double-junction solar cells with a high open-circuit voltage (V<inf>oc</inf>) and a low temperature coefficient (TC) were developed using a wide bandgap a-SiO:H film as the intrinsic (i) layer of the top cell. It was found that with an increasing carbon dioxide (CO<inf>2</inf>)/silane (SiH <inf>4</inf>) ratio, the optical bandgap (E<inf>opt</inf>) of the a-SiO:H films increased remarkably while the photogain tended to decrease. By employing an optimized a-SiO:H film as the i top layer of the a-SiO:H/a-Si:H solar cell, an initial conversion efficiency (η) of 10.2% was obtained. This solar cell showed a higher η than the conventional a-Si:H/a-Si:H structure, a result of incremental improvements in the V<inf>oc</inf> and short-circuit current density (J<inf>sc</inf>), which were attributed to the wider bandgap of the intrinsic top layer. It was found that the TC for η of the a-SiO:H/a-Si:H solar cell was -0.10%/°C, slightly lower than that of the a-Si:H/a-Si:H solar cell, whose TC value is about -0.15%/°C. The light-induced degradation (LID) ratio for η of the a-SiO:H/a-Si:H solar cell was approximately 19%, which was 2% lower than that of the a-Si:H/a-Si:H solar cell. These results have demonstrated the great potential of the i-a-SiO:H films as absorber layers of top cells in multi-junction silicon-based thin-film solar cells. The a-SiO:H/a-Si:H solar cells with low TCs and low LID ratios are attractive for their potential use in high-temperature environments or tropical regions. © 2013 Elsevier B.V.