Preparation of stably luminescent perovskite quantum dots/acrylate copolymer composite applicable in animated display

Animated displays and fluorescent devices are researched for fashion media. In this work, perovskite nanocrystals (PNCs)/copolymer composite with high luminescent intensity and stability was prepared. Two composites bearing PNCs (various polymer matrices) were fabricated via drop-coating method. Micro-/nano-structure, crystallization, and light absorption/photoluminescence (PL) traits of PNCs were characterized. PNCs/poly(methyl methacrylate- co -butyl acrylate) (PMMA- co -PBA) composite shows a better film-forming property than PNCs/polymethyl methacrylate (PMMA) composite. PL-emission properties of PNCs/copolymer composite are comparable to PNCs, including the maintained emission wavelength (~ 521 nm) and narrow emission half-peak width. For high fluorescent stability after air/ultraviolet aging, PNCs/copolymer composite is superior to PNCs and PNCs/homopolymer composite. PNCs/copolymer composite shows a PL intensity of ~ 90% after air aging for 40 days (~ 80% after ultraviolet aging for 120 h). Luminescent film devices via PNCs/copolymer composite were studied, and effective green-/white-light emissions were achieved. The present white-light emission is close to the international standard. This work might enable a large-scale preparation of quantum dots/polymer composites for luminescent devices.