Gram-scale and solvent-free synthesis of Mn-doped lead halide perovskite nanocrystals

Article abstract of DOI:10.1016/j.jallcom.2019.152393

Although Mn-doped lead halide perovskites could alleviate the environmental burden of Pb, their synthesis process suffers from intricate operations, high operating temperature, low production, or toxic strong polar solvents. Developing a simple and green route for Mn-doped halide perovskites with mass production is highly desirable for perovskite-derived applications. In this work, we developed a facile and environmental-benign synthesis strategy for large-scale preparation of Mn-doped lead halide perovskite nanocrystals. The nanocrystals were prepared via a mechano-synthesis process without organic solvents. We investigated the influence of atomic composition on their morphology, crystal structure and optical performance. Our results show that the perovskite nanocrystals have dual-emissions from the ⁴T₁ to ⁶A₁ transition of Mn²⁺ and the excitonic recombination of perovskite hosts, respectively. The achieved Mn:CsPbX₃ nanocrystals show well-tailored color rendering when used as LED phosphors. This work presents a scalable and facile strategy for Mn-doped perovskite production without organic solvents, which promises low-cost and eco-friendly LEDs.