摘要： Antimony (Sb) has been identified as a promising candidate for replacing toxic lead (Pb) in perovskite materials because Sb-based perovskite-like halides exhibit not only intrinsic thermodynamic stability but also a unique set of intriguing optoelectronic characteristics. However, Sb-based perovskite-like halides still suffer from a poor film morphology and uncontrollable halide constituents, which result from the disorder of the growth process. Herein, we propose a simple strategy to facilitate heterogeneous nucleation and control the dimension transformation by introducing bis(trifluoromethane)sulfonimide lithium (LiTFSI), which produces high-quality two-dimensional (2D) MA3Sb2I9-xClx films. As the spacer molecule among Sb-based pyramidal clusters, LiTFSI plays a role in forming a zero-dimensional (0D) intermediate phase and retarding crystallization. The slower dimension transformation well stabilizes the bandgap of perovskite-like films with a fixed Cl/I ratio (~7:2) and avoids random “x” values in MA3Sb2I9-xClx films prepared from the conventional method. Based on this method, Sb-based perovskite-like solar cells (PLSCs) achieve the highest recorded power conversion efficiency (PCE) of 3.34% and retain 90% of the initial PCE after being stored in ambient conditions for over 1400 h. More importantly, semitransparent Sb-based PLSCs with PCEs from 2.62% to 3.06% and average visible transparencies (AVTs) from 42% to 23% are successfully obtained, which indicates the great potential of the emerging Pb-free halide semiconductor for broad photovoltaic applications.