• 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.