Alkylammonium chloride promotes the record efficiency of perovskite solar cells

Recently in Nature, Park and coworkers elucidated the role of each long alkyl ammonium cation (RA+) and chloride (Cl−) in modulating the phase transition of FAPbI3. A record power conversion efficiency of 26.08% (certified 25.7%) with improved light stability was obtained. Recently in Nature, Park and coworkers elucidated the role of each long alkyl ammonium cation (RA+) and chloride (Cl−) in modulating the phase transition of FAPbI3. A record power conversion efficiency of 26.08% (certified 25.7%) with improved light stability was obtained.