GEORGIA TECH RESEARCH CORPORATION ATLANTA United States
During the no-cost extension period of this grant, remaining funds from a travel supplement were used to fund a month-long visit by a Georgia Tech graduate student to the University of Oxford. This provided the student with valuable training and experience in perovskite solar cell device work and enabled testing of interfacial materials developed at Georgia Tech in state-of-the-art devices. A crosslinkable p-dopable hole-transport material was found to be effective in perovskite solar cells further work on this material is being carried out under our current award FA9550-18-1-0499. In addition further studies were carried out on a crosslinkable n-dopable fullerene electron-transport material developed at Georgia Tech this work including both obtaining good efficiencies for n-i-p perovskite solar cells incorporating this material, and extending its use to p-i-n cells, in which even higher efficiencies were obtained.