Cyclopenta[<i>hi</i>]aceanthrylene-based dopant-free hole-transport material for organic–inorganic hybrid and all-inorganic perovskite solar cells

Abstract

An efficient cyclopenta[<italic>hi</italic>]aceanthrylene-based D–A–D type dopant-free hole transport material termed <bold>YN3</bold> showed impressive PCEs of 18.84% and 12.05% with very good stability in organic–inorganic hybrid and all-inorganic perovskite solar cells, respectively.