Recent advances in lead-free perovskite have opened a vast doorway for sensors and energy harvesting applications. However, toxicity, complex synthesis process, and stability were the major obstacles to their success. To address these issues, here we report an effective synthesis of Cedoped lead-free metal halide in a simple, water-assisted method. Our process reduces the use of harmful organic/inorganic solvents, enabling easy and costeffective mass production. As-synthesized Ce-doped Cs 3 MnBr 5 exhibits efficient ultraviolet (UV) absorption while being blind to the visible spectrum. The introduction of the Ce 3+ dopant in the metal halide lattice shows a broadband response to UV light with violet emission spectra at 387 and 419 nm. The material also displays a promising PL lifetime of 0.0142 ms with good stability under ambient storage conditions. A UV photodetector is designed based on the Ce-doped Cs 3 MnBr 5 thin film, which shows a promising responsivity of 1.64 A/W with a detectivity of 5.3 × 10 11 jones. This study demonstrates an eco-friendly, cost-effective strategy for fabricating a UV photodetector for novel and advanced UV optoelectronic systems.
Despite the excellent performance of halide perovskite, low stability, and ion exchange between halides have remained obstacles to practical application. Herein, the polymer capsule encapsulated perovskite through the conventional hot‐injection method is reported to overcome the above issues. The residual heat generated during perovskite synthesis is utilized to expand the layer, and the perovskite particles are grown inside the polyethylene capsule. The products are gathered in a powder state, and the whole emission range can be synthesized. The water stability after 6 h soaked in water shows ≈90% and ≈75% for green and red, respectively. Also, due to the suppressed ion exchange, the single multi‐conversion layer for white light generation can be fabricated.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.