“…In addition, it has a large band gap energy value varying between 3.6 and 4 eV [7,16,19]. Due to its properties such as low electrical resistivity, high optical transmittance [12,21], and the big reflectivity in the infrared region, it can be used as, although anode in lithium-based batteries, a conductive electrode of thin layers of photovoltaic cells. The SnO 2 thin layers have been extensively prepared by employing different procedures like dual-beam pulsed laser deposition (DB-PLD) [22], spray pyrolysis [23], magnetron sputtering [24], molecular beam epitaxy (MBE) [25], and sol-gel method [26], which will be used with the spin coating to prepare our thin films; the reason this was chosen was because of its several advantages: its simplicity, low cost, and its ability to generally obtain uniform films with good adherence and reproducibility [27].…”