2, Commonwealth Scientific and Industrial Research Organization, Clayton, Victoria, Australia
3, Kunsan National University, Gunsan-si, Jeollabuk-do , Korea (the Republic of)
Power conversion efficiency (PCE) of organic-inorganic hybrid perovskite photovoltaics has reached over 22% from research cells fabricated by spin coating. Although the efficiency is already high enough to enter photovoltaic market, there are still a lot of issues to be address for commercialization of the technology. One of the issues is manufacturability of the technology. Champion devices have been fabricated predominantly by spin coating and there has been only few demonstrations of high performance perovskite PV by industry-relevant methods. In this presentation, high performance perovskite solar cells fabricated by slot-die coating, the most common method for production of printed PVs, will be presented. To achieve high performance, we engaged hot deposition method. Improved performance of perovskite PV with increased grain size of perovskite crystals by hot deposition has been reported. We carried out systematic study on temperature effects of substrate and solution on crystal growth and device performance. The results clearly show temperature effects on nucleation of perovskite crystals and improved performance with optimized high temperature condition. Furthermore, this optimized method was evaluated as the high reproducible process with increasing device area up to 10cm × 10cm module which can be the potential for production. Demonstration of hot deposition in roll-to-roll process will be also presented.