Perovskite microcells fabricated using swelling-induced crack propagation for colored solar windows

• Main Authors: Kim, D.H (Author), Kim, D.-H (Author), Kim, Y.J (Author), Ko, J.H (Author), Lee, W. (Author), Park, J. (Author), Song, Y.M (Author), Yoo, Y.J (Author), Yun, H. (Author)
• Format: Article
• Language: English
• Published: Nature Research 2022
• Online Access: View Fulltext in Publisher
• ISBN: 20411723 (ISSN)
• DOI: 10.1038/s41467-022-29602-z

Perovskite microcells have a great potential to be applied to diverse types of optoelectronic devices including light-emitting diodes, photodetectors, and solar cells. Although several perovskite fabrication methods have been researched, perovskite microcells without a significant efficiency drop during the patterning and fabrication process could not be developed yet. We herein report the fabrication of high-efficiency perovskite microcells using swelling-induced crack propagation and the application of the microcells to colored solar windows. The key procedure is a swelling-induced lift-off process that leads to patterned perovskite films with high-quality interfaces. Thus, a power conversion efficiency (PCE) of 20.1 % could be achieved with the perovskite microcell, which is nearly same as the PCE of our unpatterned perovskite photovoltaic device (PV). The semi-transparent PV based on microcells exhibited a light utilization efficiency of 4.67 and a color rendering index of 97.5 %. The metal–insulator–metal structure deposited on the semi-transparent PV enabled to fabricate solar windows with vivid colors and high color purity. © 2022, The Author(s).