Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 42, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202000606
Keywords
light induced cross‐ linking; luminescent elastomer; perovskite nanocrystal; silicone material; thiol– ene reaction
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Funding
- National Natural Science Foundation of China [21774070]
- Shandong province major scientific and technological innovation projects [2017CXGC1112]
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The study presents a method for preparing luminescent composite materials by embedding inorganic lead halide perovskite nanocrystals into silicone elastomer networks, utilizing an environmentally friendly thiol-ene cross-linking reaction. The resulting materials exhibit strong tensile stress and excellent luminescent stability.
The preparation of a series of luminescent perovskite-silicone elastomer (PSE) composites by embedding inorganic lead halide perovskite nanocrystals (CsPbBr3 NCs) into networks constructed by trimethylolpropane tris(2-mercaptoacetate) and sulfone-containing silicone copolymers with vinyl side groups (PSMVS) is reported herein. The networks are obtained by an environmentally friendly thiol-ene cross-linking reaction under 30 W household LED light. The conducted analysis shows that the prepared PSEs display strong green fluorescence due to encapsulation of CsPbBr3 NCs, which constitute a luminescent center in sulfone-containing silicone networks. Using PSMVS as basic polymers instead of commercial polysiloxanes endows PSEs with enhanced mechanical strength and excellent luminescent stability at high temperatures. The PSEs show robust tensile stress and >650% elongation. Additionally, the construction of colorful ultraviolet light-emitting diodes (UV-LEDs) by an in situ cross-linking process is described.
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