Composition-Dependent Crystallization of Wide-Bandgap Perovskite Solar Cells via Intense Pulsed Light Annealing
Key Points
To explore the effects of intense pulsed light annealing on wide-bandgap perovskite solar cells with varying bromine content.
Examined crystallization of perovskite films with different bromine contents (0.15Br and 0.24Br)
Utilized intense pulsed light annealing for rapid processing of precursor films
Evaluated efficiency and durability of single-junction devices
Achieved 22.41% efficiency in a 1.68 eV single-junction device
Improved film uniformity and microstructure noted in perovskite absorbers
Enhanced stability observed with IPL-processed devices
Abstract
Perovskite solar cells have emerged as a major research focus due to their high efficiency and suitability for tandem integration. Intense pulsed light (IPL) annealing offers a rapid, low-cost route to convert precursor films into perovskite absorbers within milliseconds. Here, we study IPL processing of ∼1.68 eV wide-bandgap perovskites with varying bromine content (0.15Br and 0.24Br). IPL enables improved crystallization, film uniformity, and microstructure, resulting in enhanced efficiency and stability. A 1.68 eV single-junction device fabricated via IPL achieves 22.41% efficiency with excellent durability.