Abstract
As a kind of promising optoelectrical material, all-inorganic perovskite nanocrystals CsPbX3 (X = Cl, Br, I) have attracted much attention, due to their excellent optoelectrical characteristics, in recent years. However, their synthesis approaches require rigorous conditions, including high temperature, eco-unfriendly solvent or complex post-synthesis process. Herein, to overcome these issues, we reported a novel facile room temperature in-situ strategy using ultraviolet polymerizable acrylic monomer as solvent to synthesis CsPbX3 nanocrystals without a complex post-synthesis process. In this strategy, adequate soluble precursors of Cs, Pb and Br and reaction terminating agent 3-aminopropyltriethoxysilane (APTES) were used. The obtained CsPbBr3 nanocrystals showed a high photoluminescence quantum yields (PLQY) of 87.5%. The corresponding polymer composites, by adding light initiator and oligomer under ultraviolet light radiation, performed excellent stability in light, air, moisture and high temperature. The reaction process and the effect of the reaction terminating agent have been investigated in detail. This strategy is a universal one for synthesizing CsPbX3 nanocrystals covering visible light range by introducing HCl and ZnI2.
Highlights
Many synthetic approaches have emerged to prepare the high performance of perovskite nanocrystals (PNCs) and their composites, including hot injection [4], supersaturated recrystallization [15], top-down [16], mechanochemistry [17], in-situ synthesis [18], microwave assistant [19], volatilization of solvent [20], etc
High temperature, gas protection, eco-unfriendly solvent and other conditions required by these methods lead to difficulty for mass production [4,12]
photoluminescence quantum yield (PLQY) was estimated according to standard procedure, using Rhodamine B (95% of the yield in ethanol) as reference
Summary
Many synthetic approaches have emerged to prepare the high performance of perovskite nanocrystals (PNCs) and their composites, including hot injection [4], supersaturated recrystallization [15], top-down [16], mechanochemistry [17], in-situ synthesis [18], microwave assistant [19], volatilization of solvent [20], etc. Sci. 2020, 10, 3325 dissolve Cs, Pb and halogen precursors. To solve this problem, many researchers have devoted time to exploring an eco-friendly and cost-effective strategy, such as aqueous or alcohol synthesis [23,24,25,26,27]
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