A monolithically integrated near-infrared imager with crystallization- and oxidation-modulated tin-lead perovskites.

The fast crystallization and facile oxidation of Sn of tin-lead (Sn-Pb) perovskites are the biggest challenges for their applications in high-performance near-infrared (NIR) photodetectors and imagers. Here, we introduce a multifunctional diphenyl sulfoxide (DPSO) molecule into perovskite precursor ink to response these issues by revealing its strong binding interactions with the precursor species. The regulated perovskite film exhibits a dense morphology, reduced defect density and prolonged carrier diffusion length.

Buried Grating Enables Fast Response Self-Powered Polarization-Sensitive Perovskite Photodetectors for High-Speed Optical Communication and Polarization Imaging.

Polarization-sensitive perovskite photodetectors (PSPPDs) have demonstrated great potential for acquiring multidimensional data in remote sensing, security, and optical communication fields. However, requirements of external power supplies and polarization systems, slow response, and poor long-term stability restrict PSPPDs' further development. Herein, a self-powered PSPPD with buried grating structures induced by ultrafast laser direct writing is designed.