Synthesis of CH<SUB>3</SUB>NH<SUB>3</SUB>PbBr<SUB>3</SUB> Core/Shell Quantum Dots using by 3-aminopropyl(diethoxy)methylsilane for Enhanced Dispersibility
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초록
내용
Organometal halide perovskite quantum dots (PQDs) have high-purity light-emitting materials and a wide wavelength range, which can be a significant advantage in display application. However, the commercialization of QDs synthesized using halide perovskites is hindered by its low thermal stability and instability during their long-time exposure to external light sources as a major drawback. Encapsulating the QDs is one way of overcoming these drawbacks. We synthesized core/shell QDs using silica material. Here, to improve these issues, the synthesis of hydrophobic QDs@SiO2 structures through a one-step method is presented. The synthesized QDs@SiO2 obtained a maximum PLQY of 96.5 %. A shell was made to protect the core by using a hydrophobic ligand outside the QDs, and as a result, the emission of heavy metal perovskite was suppressed. QDs@SiO2 protected the decomposition of QDs in a polar environment, and PL was maintained even in a thermal environment.