This work presents a utilization of spray deposition technique in the fabrication of thin film perovskite solar cell devices with an assistance of a homemade CNC machine. An 80 nm-thick compact TiO2 was sprayed at a substrate temperature of 400 °C for electron blocking layer. Both one and two-step spray deposition technique are used to compare the quality of the perovskite absorber layer. A large grain size and voids free CH3NH3PbI3 film achieved by using the two-step spray deposition process. When such films are incorporated into a solar cell device with conductive carbon counter electrode, the maximum power conversion efficiencies of up to 9.58% are realized. This approach could pave the way to develop low-cost perovskite solar cell.
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This research was funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant No. 103.02-2015.49.
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Duong, T., Tran, T. & Le, Q. CNC assisted spray deposition of large grain size CH3NH3PbI3 film for perovskite solar cells. J Mater Sci: Mater Electron 30, 11027–11033 (2019). https://doi.org/10.1007/s10854-019-01444-4