Authors: Wei Peng, Lingfei Wang, Banavoth Murali, Kang‐Ting Ho, Ashok Bera, Namchul Cho, Chen‐Fang Kang, Victor M Burlakov, Jun Pan, Lutfan Sinatra, Chun Ma, Wei Xu, Dong Shi, Erkki Alarousu, Alain Goriely, ‐Hau He Jr,
Keywords: hybrid perovskites, single crystals, hole-transporter free solar cells, CH3NH3PbBr3
Abstract: High-quality perovskite monocrystalline films are successfully grown through cavitation-triggered asymmetric crystallization. These films enable a simple cell structure, ITO/CH3NH3PbBr3/Au, with near 100% internal quantum efficiency, promising power conversion efficiencies (PCEs) >5%, and superior stability for prototype cells. Furthermore, the monocrystalline devices using a hole-transporter-free structure yield PCEs ≈6.5%, the highest among other similar-structured CH3NH3PbBr3 solar cells to date.