Low cost spin coating fabrication of efficient Perovskite thin film layers

Development of fabrication techniques to produce cost efficient Perovskite absorption layers via spin coating techniques using the WS650 spin processor (Laurell Technologies) were investigated. The methyl ammonium lead iodide (CH₃NH₃PbI₃) perovskite was deposited on top of soda lime glass (SLG) substrates. Two ways of depositing CH₃NH₃PbI₃ were explored. The two techniques used to create the perovskite absorption are air drying at 65°C and a solvent-solvent extraction (SSE) method. Rapid processes such as the SSE method will be compared to the air-drying method. Various instruments will be used to characterize the perovskite absorption layer including: Cary 5000 UV-Vis spectrophotometer, and Hitachi S-4800 Scanning Electron Microscope (SEM), the Thermo Scientific DXR SmartRaman spectrometer and Bruker D8 Discover X-Ray Diffraction (XRD). The results were used to evaluate the energy band gap, crystallite size, and crystal structure. Achieving a high quality perovskite layer, while having simple fabrication methods, is the primary focus of this study.