Work

Large‐Scale In Situ Formation Perovskite Quantum Dots/Elastomer Composite for High‐Performance White Light‐Emitting Diodes

Year: 2026

Type: article

Abstract: ABSTRACT Metal halide perovskite quantum dots (PQDs) are promising emitters for light conversion but suffer from poor compatibility and scalability in polymer composites. Herein, we report a one‐step, solvent‐free mechanochemical strategy for the in situ synthesis of CsPbX 3 (Br/Cl) QDs within halogenated butyl rubber (HIIR) via open‐mill shear, yielding monodisperse 2.6 nm CsPbBr 3 QDs uniformly embedded in a topological entanglement network. The CsPbX 3 /HIIR composite exhibited a narrow emission at 515 nm (FWHM 17 nm), photoluminescence quantum yield of 91%, and ultra‐long lifetime of 1189 ns. Spectroscopic and mechanistic studies revealed that the in situ‐generated IIR‐OOCC 17 H 35 chains create an interfacial allyl ester passivation layer that suppresses surface traps and blocks H 2 O/O 2 ingress. Consequently, films retained > 90% initial intensity after 30‐day ambient storage, 99.8% after 30‐day water immersion, and 44% after 500 h blue‐light irradiation (5000 nit). Flexible white LEDs achieved standard white emission (0.333, 0.338), color‐rendering index of 55.7, and wide color gamut of 132% NTSC. The low‐cost and high‐efficiency manufacturing process can be readily scaled to 17 × 17 cm 2 films, offering an industrially viable route for stretchable displays, X‐ray scintillators, and wearable photonics.

Source: Advanced Science

DOI: 10.1002/advs.202522934