Yifeng Zhao, Esma Ugur, Arsalan Razzaq, Thomas G. Allen, Paul Prócel, Adi Prasetio, Imil Fadli Imran, Cem Yilmaz, Rik Hooijer, Jian Huang, Katarina Kovačević, Yi Zheng, Luana Mazzarella, Erkan Aydin, Stefaan De Wolf, Olindo Isabella
Tuning the nanoroughness of ( n )nc-Si:H in bottom cells controls SAM anchoring and work function shifts in monolithic perovskite–silicon tandems. Enhanced nanoroughness improves interface quality and fill factor, enabling efficiencies up to 32.6%.