Optimization of type and concentration of dopant (Sb and Al) for ZnO thin films prepared by spray pyrolysis technique and their applications in perovskite solar cells

Abstract

In the present study, doped and pure ZnO films are prepared by low cost spray pyrolysis technique. Three types of dopants (Al and Sb) are used and their doping concentration is optimized successfully. The absorption spectra of prepared films are carried out by UV-VIS spectrophotometry. The films are characterized by X-ray diffraction (XRD) for structural analysis. Both the pure and doped ZnO films are consequently applied in perovskite solar cell device preparation. Additionally, solar cell device is made with low cost CuI (as hole transport material) and carbon (as counter electrode). The solar cell efficiency was measured by solar simulator connected with Kiethly source meter under one sun illumination. The power conversion efficiency (PCE) obtained for 8% Al-doped ZnO is maximum (3.47%) among all devices.