Heteroarylated Dithienopyrroles (Part 2)

Ulm University

In this publication, we describe functionalization of heteroarylated dithienopyrroles (DTP) by triarylamines and their application as hole-transport materials (HTM) in perovskite solar cells which was investigated by the cooperation partners at EPFL in Lausanne, Switzerland. The new HTMs showed promising photovoltaic performance with efficiencies exceeding 18%. A thorough investigation of the electronic and optoelectronic properties revealed that the main efficiency loss mechanisms are not related to the pristine HTM materials but to the suboptimal interface passivation and HTM doping. The results were published with the title „Broadly Applicable Synthesis of Heteroarylated Dithieno[3,2-b:2′,3′-d]pyrroles for Advanced Organic Materials – Part 2: Hole-Transporting Materials for Perovskite Solar Cells“ in   the journal Organic Materials (2023, 5, 48-58).
https://DOI: 10.1055/a-1972-5978