Hole Transporting Materials: Development of Dopant‐Free Organic Hole Transporting Materials for Perovskite Solar Cells (Adv. Energy Mater. 13/2020)

In article 1903326, Prashant Sonar and co-workers review the state-of-the-art for dopant-free organic hole transporting materials (HTMs) in perovskite solar cells. Depicted, are different device architectures using the small molecular HTM, ACE-QA-ACE, which has shown enhanced stability over doped HTMs.