Precise design of chiral-polar hybrid perovskites toward efficient self-powered full-stokes photodetection

<p>Full-Stokes polarimeters can efficiently discriminate the multipolarization of lights, showing great potential in fields of medical science, military and optoelectronics. However, most of the current full-Stokes polarimeters are limited by complex optical devices and low detection accuracy of Stokes vectors, which impeded their practical optoelectronic application. In this work, we successfully designed two novel chiral-polar hybrid perovskites, ((<i>R</i>)-<i>��</i>-MPA)PAPbI₄ and ((<i>S</i>)-<i>��</i>-MPA)PAPbI₄ (<b>R-1</b> and <b>S-1</b>, MPA = methylphenethylamine and PA = propylamine), which show distinctive bulk photovoltaic effect (BPVE). The BPVE enables efficient self-driven detection of linearly and circularly polarized light (LPL and CPL, respectively) in a single-crystal device of <b>R-1</b>. Such detection possesses high LPL sensitivity with a polarization ratio reaching 1.52 and CPL distinguishability reaching 0.4, achieving highly accurate full-Stokes polarization detection with the Stokes parameter averaging error of less than 0.08. To the best of our knowledge, this is the first report on chiral hybrid perovskite realizing self-powered full-Stokes photodetection based on BPVE. These results provide new insights into the design of chiral materials for high-performance multipolarization photodetection.</p>