Key Takeaways & Executive Findings
- •• A novel method for in situ synthesis of CsPbBr3 perovskite quantum dots in electrospun fluoroplast fibers without additional stabilizers. • Emission peaks tunable from 507 to 517 nm under 365-nm excitation, correlated with particle size and processing time. • Luminescent stability maintained for up to 2.5 years, demonstrating excellent encapsulation by the polymer matrix. • Potential for flexible optoelectronic devices due to high photoconductivity and efficient light energy conversion.
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 CsPbBr3, 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.
1. Introduction
In comparison with phosphorus materials widely used for the down-conversion of the emission of visible light sources, the all-inorganic CsPbX3 (X = Cl, Br, I) perovskite quantum dots (PQDs) exhibit outstanding performance with high quantum yield (QY) and narrow luminescent peak. However, CsPbX3 PQDs require efficient encapsulation into a compatible protective holder, e.g. polymer thin film, in order to integrate with application light sources, because the all-inorganic halide perovskites, though being very stable in comparison with other commonly used perovskites, are still susceptible to humidity and air atmosphere limiting its lifetime. Moreover, the excellent optical properties of CsPbX3 PQDs are provided essentially by their nanoscale size (about 5−10 nm PQD diameter) allowing quantum confinement.
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Alexey Serdobintsev, Vladimir Neplokh, Alexander Koryakin, Ilia Kozhevnikov, Anastasiya Yakubova, Demid Kirilenko, Mariia Saveleva, Sergey Makarov, Ivan Mukhin, Polina Demina (2025). In situ synthesis and stabilization of perovskite quantum dots in electrospinned fibers. SinoTechIntel Verified Research. https://doi.org/10.1088/1674-4926/25060014
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Frequently Asked Questions
What is the main achievement of this research?
The research demonstrates a method for in situ synthesis of stable CsPbBr3 perovskite quantum dots in electrospun fluoroplast fibers, achieving luminescent stability for up to 2.5 years without additional stabilizers.
How are the perovskite quantum dots synthesized?
Equimolar solutions of cesium and lead (II) bromide are mixed with a fluoroplast and processed via electrospinning, leading to the formation of CsPbBr3 quantum dots within the fibers.
What are the optical properties of the resulting material?
The material exhibits emission peaks ranging from 507 to 517 nm under 365-nm excitation, with peak position dependent on particle size and processing time.
What are potential applications of this material?
The stable luminescent nonwoven fabric is promising for flexible optoelectronic devices, such as light-emitting diodes, photodetectors, and other photonic applications.
How long does the luminescent stability last?
The developed materials maintained stable luminescent properties for up to 2.5 years.
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