Large Area Spin Polarization Measurements of Chiral Metal Halide Perovskites

Chiral metal halide perovskites (MHPs) have emerged as promising materials for spin-related applications due to their unique chiral-induced spin selectivity (CISS) effect. Numerous studies have employed electrical methods to measure spin transport through perovskites using atomic force microscopy (AFM). However, AFM provides local measurements that do not represent large-area films, which are crucial for devices like spin light-emitting diodes (spin-LEDs) and spin lasers. In this study, we develop a large-area method to quantify the spin polarization of perovskite films. By addressing this gap, our method offers an accurate assessment of spin polarization in practical device applications, paving the way for improved performance of perovskite-based spintronic devices.