Abstract

ROUHBAKHSHMEGHRAZI, Amirreza  and  MADADI, Mahdi. Novel Design of polycrystalline CdTe/Si Tandem Solar Cells Using SiO2/TiO2 Distributed Bragg Reflector. Tecciencia [online]. 2020, vol.15, n.28, pp.67-75.  Epub Dec 18, 2020. ISSN 1909-3667.  https://doi.org/10.18180/tecciencia.28.6.

In this paper, a polycrystalline cadmium telluride/silicon (CdTe/Si) solar cell based on SÍO 2 /TÍO 2 distributed Bragg reflector (DBR) is proposed and investigated using calibrated simulations with experimental data of previous fabrication device. At first, by inserting the SiO 2 /TiO 2 DBR, the conversion efficiency is increased by about 25% compared with the conventional CdTe/Si solar cell with similar dimensions. In addition, the carrier lifetime of absorber layer can provide an improved conversion efficiency of 15% compared with the CdTe/Si conventional solar cell. The obtained open circuit voltage, short circuit current density, fill factor and conversion efficiency of proposed solar cell structure were about 1.2V, 39.5mA/cm 2 , 0.95 and 28.5% under global AM 1.5 conditions, respectively. The results strongly confirm that the polycrystalline CdTe/Si solar cell based on SiO 2 /TiO 2 DBR seems to be the most optimal choice for converting the solar energy in high efficiency photovoltaics systems.

Keywords : Novel design; CdTe/Si; SiO ₂ /TiO ₂; Tandem Solar Cells; Distributed Bragg reflector (DBR).

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