In situ synthesis and stabilization of perovskite quantum dots in electrospinned fibers

Abstract Flexible materials with perovskite quantum dots (PQDs) are widely used in the field of photonics and opto-electronics due to their unique properties. Development of new materials based on these nanoparticles, incorporated into flexible and lightweight nonwoven fabrics, demonstrated high photoconductivity and efficient light energy conversion. In this work, we propose a method for creating a stable luminescent nonwoven material using electrospinning, in which inorganic salt precursors are used without the need for additional stabilizers. Equimolar solutions of cesium and lead (Ⅱ) bromide were mixed with a fluoroplast, resulting in a series of samples. Luminescent materials were obtained containing PQDs with a composition of CsPbBr 3 , with emission peaks ranging from 507 to 517 nm under 365-nm excitation. We have experimentally established and theoretically confirmed that the peak position is related to the size of the particles formed in the fiber during electrospinning and depends on processing time. Developed materials exhibited stable luminescent properties for up to 2.5 years, making them a promising candidate for the development of new flexible optoelectronic devices based on PQDs.