Facile Route to Highly Stable CH<SUB>3</SUB>NH<SUB>3</SUB>PbBr<SUB>3</SUB> Quantum Dots with High Production Yields and Their Optoelectronic Applications
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CH3NH3PbBr3 (MAPbBr3) perovskite quantum dots (QDs) have attracted great attention as promising and cost-effective elements for optoelectronic devices. However, commonly used polar non-solvents can damage the QD cores during centrifugation for purification, which significantly diminish their production yields and optical properties. Here, we introduce an effective non-solvent to purify as-synthesized MAPbBr3 QDs without severe damage, obtaining stable QDs with high production yields. The washed MAPbBr3 QDs maintained their high photoluminescence (PL) quantum yields and crystalline structures for long times. Time-resolved (PL) analysis revealed that the QDs showed suppressed non-radiative recombination and a prolonged (PL) lifetime, supporting the minimized damage on the QDs. Finally, we fabricated stretchable and self-healable green color filters for the demonstration of white light-emitting diodes by composing the MAPbBr3 QDs with a thermoplastic elastomer.