Tracks: 2018FLEX Full Conference, Emerging Technologies, Manufacturing on Flex
The performance of the perovskite material in solar cells has garnered a fair amount of interest because it is solution processable and thus a prime target for roll-to-roll coating. Although the annealing of the material post deposition is typically done at low temperatures, it still requires a long residence time. Moving to a radiative annealing method over a large area could significantly reduce the time required. In this talk we will present our research with the photonic annealing using intense pulsed light of the perovskite thin films for applications in solar cells. The perovskite films absorb the white light and release this energy as heat annealing the material. Scanning electron microscopy and X-ray diffraction analysis shows that the films achieve consistent morphology and crystallinity and perform well in solar cell devices. The annealing event occurs at very high temperatures, but only for a fraction of a second. The speed of the process as well as the area of processing make this an ideal candidate for roll-to-roll techniques. Adoption into of the photonic process with high speed processing also requires formulation designs that can assist with deposition and annealing. Results of several chemistry precursors will be presented along with future plans towards full incorporation into roll-to-roll manufacturing.