Towards an optimum silicon heterojunction solar cell configuration for high temperature and high light intensity environment
Daif, Ounsi El
De Wolf, Stefaan
KAUST DepartmentMaterials Science and Engineering Program
Physical Sciences and Engineering (PSE) Division
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AbstractWe report on the performance of Silicon Heterojunction (SHJ) solar cell under high operating temperature and varying irradiance conditions typical to desert environment. In order to define the best solar cell configuration that resist high operating temperature conditions, two different intrinsic passivation layers were tested, namely, an intrinsic amorphous silicon a-SiO:H with CO/SiH ratio of 0.4 and a-SiOx:H with CO/SiH ratio of 0.8, and the obtained performance were compared with those of a standard SHJ cell configuration having a-Si:H passivation layer. Our results showed how the short circuit current density J, and fill factor FF temperature-dependency are impacted by the cell's configuration. While the short circuit current density J for cells with a-SiO:H layers was found to improve as compared with that of standard a-Si:H layer, introducing the intrinsic amorphous silicon oxide (a-SiO:H) layer with CO/SiH ratio of 0.8 has resulted in a reduction of the FF at room temperature due to hindering the carrier transport by the band structure. Besides, this FF was found to improve as the temperature increases from 15 to 45°C, thus, a positive FF temperature coefficient.
CitationAbdallah A, Daif OE, Aïssa B, Kivambe M, Tabet N, et al. (2017) Towards an optimum silicon heterojunction solar cell configuration for high temperature and high light intensity environment. Energy Procedia 124: 331–337. Available: http://dx.doi.org/10.1016/j.egypro.2017.09.307.
SponsorsThis work has been carried out within the Qatar Environment and Energy Research Institute (QEERI) and Ecole Polytechnique Fédérale de Lausanne (EPFL), Photovoltaics and Thin-Film Electronics Laboratory (PV-lab) collaboration.
Conference/Event name7th International Conference on Silicon Photovoltaics, SiliconPV 2017