The Korea Institute of Energy Research (President Yi Chang-KEUN, Hereinafter Referred to as “Kier”) Achieved a power conversion efficiency of 23.64%, which is the world’s highhest efficiency of the flexible perovskite/cigs tandem solar cells reported to date. (Tagstotranslate) NewsWise (T) Applied Sciences and Engineering (T) All Journal News (T) Energy (T) Engineering (T) Materials Science (T) Technology (T) NASIARCIL OC Technology