The Intense Pulsed Light technology is well suited to continuous manufacturing platforms such as roll-to-roll due to its very large processing area and rapid processing time scales. The IPL technique delivers high energy pulses of broad spectrum light (UV-Vis-NIR) in a very short duration (ms) over a large processing area (100 cm2). In the past few years, the method has found a number of applications within the flexible electronics industry as printed structures for wire traces, transparent conductors and RFID and is now gaining traction with more complex materials. The most promising opportunity for the IPL within photovoltaics is the application towards the flexible large area roll-to-roll production offered by the solution phase processed perovskites.
In this paper we will discuss our work with the IPL and the extremely rapid processing of perovskite thin films using a number of precursor materials. We have shown the process for both the two-step and the single step deposition producing devices that perform as well as the traditional thermal processing at significantly faster speeds. This paper will also discuss the morphological changes that occur during the IPL with an intent to develop a robust process. Data from X-ray diffraction and scanning electron microscopy is used to describe the changes to the films, and current-voltage and electrochemical impedance spectroscopy is used to probe the devices.