Ray Tracing of Perovskite Thin Films for Solar Windows

Abstract:

In this work, OPAL 2 is used to perform ray tracing simulation on perovskite thin films based on methylammonium lead triiodide (CH₃NH₃PbI₃) and methylammonium lead tribromide (CH₃NH₃PbBr₃) for solar windows. The thicknesses of both perovskite materials are varied between 100 nm and 500 nm. The ray tracing is carried out within 300-1000 nm wavelength region with AM1.5G solar spectrum as the illumination source. Perovskite solar cells based on CH₃NH₃PbI₃ demonstrate absorption edge up to wavelength of 800 nm. The short-circuit current density (J_sc) improves from 11.71 mA/cm² to 21.07 mA/cm² due to the increased perovskite thickness from 100 nm to 500 nm. On the contrary, the average visible transmission (AVT) drops from 45% to 13%. For perovskite solar cells based on CH₃NH₃PbBr₃, the absorption edge is shifted to wavelength of 550 nm due to the increased band gap. The J_sc increases from 3.49 mA/cm² to 7.25 mA/cm² when the thickness is increased from 100 nm to 500 nm. However, the AVT drops from 74% to 59%. The findings from this work show that a trade-off is required when maximizing the J_sc of the solar cells while maintaining reasonable transparencies through the solar windows.

• Periodical: Key Engineering Materials (Volume 946)
• Pages: 81-86
• DOI: https://doi.org/10.4028/p-jz1r14
• Online since: May 2023
• Authors: Zulfa Zahri, Mohd Marzaini Mohd Rashid, Mohd Zamir Pakhuruddin*
• Keywords: Perovskite Thin Films, Ray Tracing, Solar Windows

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