Investigating the effect of adding graphene oxide on the microstructure an‎d optical properties of TiO2-based nanocomposite for perovskite solar cells applications

10/22/2026 12:00:00 AM

Given the environmental challenges an‎d the need to reduce dependence on fossil fuels, renewable energies, particularly solar energy, as one of the cleanest an‎d most abundant energy sources, have attracted the attention of many researchers. Perovskite solar cells, due to their low production cost an‎d high efficiency, are considered one of the most promising options in this field. One of the key factors in improving the performance of these cells is optimizing the electrical an‎d optical properties of electron transport layers (ETL). In this study, the effect of adding graphene oxide (GO) to titanium dioxide (TiO2) nanoparticles as an electron transport layer in perovskite solar cells was investigated. TiO2 nanoparticles were synthesized using the sol-gel method, an‎d graphene oxide was synthesized using the modified Hummersʹ method. Subsequently, the TiO2/GO nanocomposite was prepared by combining these two materials. The structural an‎d optical properties of the nanocomposite were eva‎luated using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), an‎d photoluminescence spectroscopy (PL). The results showed that adding 5 wt% graphene oxide to TiO2 led to a reduction in particle size. Furthermore, PL results indicated a decrease in electron-hole recombination an‎d an improvement in the optical an‎d electronic properties of the nanocomposite. Due to its enhanced properties, this nanocomposite demonstrates high potential for use as an electron transport layer in perovskite solar cells.

نانوكامپوزيت TiO2/GO , لايه انتقال‌دهنده الكترون , سلول خورشيدي پروسكايتي , خواص نوري , ريزساختار

TiO2/GO nanocomposite , electron transporting layer , perovskite solar cells , optical properties , microstructure

Adel Ghorbanzadeh kaftroudy

Dr.Seyyed Mohammad Mirkazemi