Bi-functional interfaces by poly(ionic liquid) treatment in efficient pin and nip perovskite solar cells
Pietro Caprioglio, Daniel Cruz, Sebastián Caicedo‐Dávila, Fengshuo Zu, Albertus Adrian Sutanto, Francisco Peña‐Camargo, Lukas Kegelmann, Daniele Meggiolaro, Luca Gregori, Christian M. Wolff, Burkhard Stiller, Lorena Perdigón‐Toro, Hans Köbler, Bor Li, Emilio Gutierrez‐Partida, Iver Lauermann, Antonio Abate, Norbert Koch, Filippo De Angelis, B. Rech, Giulia Grancini, Daniel Abou‐Ras, Mohammad Khaja Nazeeruddin, Martin Stolterfoht, Steve Albrecht, Markus Antonietti, Dieter Neher
Abstract
In this work, we demonstrate how the use of a poly(ionic liquid) interlayer in combination with perovskite solar cells provides a bi-functionality of the surface allowing to concomitantly reduce the energy losses, enhance the charge extraction and improve the device stability all at once.