Interface passivation using diketopyrrolopyrrole‐oligothiophene copolymer to improve the performance of perovskite solar cells. - Abicho, Samuel; Hailegnaw, Bekele; Mayr, Felix; Cobet, Munise; Yumusak, Cigdem; Esubalew, Siraye; Yohannes, Teketel; Kaltenbrunner, Martin; Sariciftci, Niyazi Serdar; Scharber, Markus Clark; Workneh, Getachew Adam (Energy Science & Engineering, 2024)