استفاده از نانو‌ذرات Fe3O4 بازيافت شده جهت ساخت لايه انتقال دهنده حفره در سلول‌هاي خورشيدي پروسكايتي پايه كربن و شكافت فوتوالكتروشيميايي آب

Using Recycled Fe3O4 Nanoparticles to Make Hole-Transporting Layer in Carbon-Based Perovskite Solar Cells an‎d Photoelectrochemical Water Splitting

نانو فناوري

Perovskite solar cells are an emerging development in solar cell technology. Despite the limitations an‎d challenges facing this technology, perovskite solar cells are a promising new path for generating clean, economical, an‎d environmentally friendly electricity from renewable an‎d inexhaustible energy sources such as sunlight. Among the types of perovskite solar cells, the carbon-based perovskite solar cell is inexpensive an‎d readily available, without the need for expensive metal electrodes, making it more cost-effective for mass production an‎d large-scale fabrication. However, carbon-based perovskite solar cells suffer from low efficiency an‎d poor coupling between the perovskite an‎d carbon electrode compared to other conventional perovskite solar cells. The use of a hole-transporting layer can prevent direct contact of the carbon electrode with the perovskite absorber layer an‎d reduce charge recombination at the interface of these two layers. The use of inexpensive metal oxides such as magnetite extracted from waste toner, which itself was made with a biocompatible approach, as a hole-transporting layer was able to improve the contact between the two layers of carbon electrode an‎d perovskite. The magnetite particles forming the hole-transporting layer were oriented by a magnetic field an‎d clustered next to each other, providing a surface with needle grains for better connection with the carbon electrode. This improved the efficiency of the perovskite solar cell based on the hole-transporting layer an‎d the carbon electrode. In this study, first, a carbon-based perovskite solar cell without a hole-transporting layer was fabricated on a scale of 0.09 cm2. After optimizing the perovskite layer, extracting magnetite powder from waste toner, an‎d optimizing the dispersion of magnetite nanoparticles in a suitable solvent, a perovskite solar cell based on a carbon electrode an‎d a hole-transporting layer with the configuration Glass / FTO / Dense TiO2 / Mesoporous TiO2 / Perovskite / Fe3O4 / Carbon was fabricated. The resulting configuration showed good performance. Field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), photovoltaic analyses such as current-voltage, impedance an‎d optical analyses such as ultraviolet-visible spectroscopy (UV-Vis), photoluminescence (PL) spectroscopy were used to investigate the solar cell an‎d the formed layers.

3

157344