Circularly polarized light (CPL) detection is required in various fields such as drug screening, security surveillance and quantum optics. Conventionally, CPL photodetector needs the installation of optical elements, imposing difficulties for integrated and flexible devices. The established CPL detectors without optical elements rely on chiral organic semiconductor and metal metamaterials, but they suffer from extremely low responsivity. Organic-inorganic hybrid materials combine CPL-sensitive absorption induced by chiral organics and efficient charge transport of inorganic frameworks, providing an option for direct CPL detection. Here we report the CPL detector using chiral organic-inorganic hybrid perovskites, and obtain a device with responsivity of 797 mA W -1 , detectivity of 7.1 × 10 11 Jones, 3-dB frequency of 150 Hz and one-month stability, a competitive combined feature for circularly polarized light detection. Thanks to the solution processing, we further demonstrate flexible devices on polyethylene terephthalate substrate with comparable performance.

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Power generated from sustainable and environmentally benign solar cell technologies is one of the key aspects in the development of clean renewable energy. Earth-abundant and non-toxic materials with suitable bandgap and absorption coefficient for photovoltaic application have drawn considerable attention in the last few decades. Here we examine Sb 2 S 3 , an emerging thin film solar cell technology that also has exciting opportunities for Si-based tandem solar cell application. We conduct a systematic analysis of Sb 2 S 3-based photovoltaic devices, highlighting major advancements and most prominent limitations of this technology. This study also encompasses device performance simulation, providing a roadmap for further Sb 2 S 3 technology development.