Mechanically flexible films of the highly crystalline molecular semiconductor are achieved via a novel grain boundary plasticization strategy in which a specially designed polymeric binder (PB) is used to connect crystallites at the grain boundaries. The new PB has a naphthalenediimide–dithiophene π-conjugated backbone end-functionalized with PDI units.
Perovskite Solar Cells: Simultaneous Bottom‐Up Interfacial and Bulk Defect Passivation in Highly Efficient Planar Perovskite Solar Cells using Nonconjugated Small‐Molecule Electrolytes (Adv. Mater. 40/2019)
Junsheng Yu, Wei Huang, Ziyi Ge, Tobin J. Marks, Antonio Facchetti, and co‐workers present a spontaneous passivation method to greatly improve the performance of perovskite solar cells (PSCs) by using a zwitterionic small‐molecule electrolyte. This bottom‐up passivation is a novel and promising strategy to overcome outstanding issues impeding PSC advances in the future.