Perovskite Quantum Dots Supplier - Alfa Chemistry

Inorganic Perovskite Quantum Dots CsPbX3(X=Br, Cl, I)


Product Description

Inorganic perovskite quantum dots (CsPbX3, X=Cl, Br, I) are a new class of optoelectronic materials with excellent photoluminescence properties, featuring ultra-high photoluminescence quantum efficiency, narrow linewidth, wide color gamut, and solution synthesis and processing, which have shown great promise in lighting display, solar cells, lasers, and other optoelectronic devices. However, similar to organic-inorganic hybrid perovskite materials, all-inorganic perovskite quantum dots containing halogens are highly susceptible to decomposition in contact with air at high temperatures or in humid environments due to the instability of their crystal structures, which greatly limits their practical applications. For this reason, Alfa Chemistry also offers ways to modify inorganic perovskite quantum dots by customizing the products accordingly.


Light Emitting Diodes

Du et al. reported a dual encapsulation strategy for inorganic perovskites quantum dots in silicon fluoride (FSiO2) and porous polydimethylsiloxane (PPDMS) foams. The dual-encapsulated CsPbBr3 QDs are very stable in humid, high-temperature and irradiated environments due to the superhydrophobic and insulating layers, and can be preserved in an air environment for at least 3 months without losing their optical properties. In addition, the FSiO2-coated CsPbBr3 QDs can be easily released from the PPDMS foam and applied to white LEDs showing pure white emission in ideal CIE (Commission Internationale de L'Eclairage 1931) chromaticity coordinates (0.33, 0.33). This novel dual packaging strategy through the combination of a solid hermetic shell and a thermally insulating porous material provides a new idea and solution to improve the stability of inorganic perovskites quantum dots.

Schematic diagram for preparing CsPbBr3 QDs FSiO2 particles and CsPbBr3 QDs FSiO2 PPDMS composite foam and the absorption and desorption processes.Fig. 1 Schematic diagram for preparing CsPbBr3 QDs/FSiO2 particles and CsPbBr3 QDs/FSiO2/PPDMS composite foam and the absorption and desorption processes. (Tu, 2021)


All-inorganic cesium-lead-bromine (CsPbBr3) perovskite quantum dots (QDs) are among the most important optoelectronic materials due to their high absorption coefficients, pronounced quantum size effects, and tunable optical properties. Jin et al. fabricated and demonstrated a self-powered PD based on all-organic CsPbBr3 perovskite quantum dots.Using the light-induced pyroelectric effect, the PDs can be used without an external power source to modulation of the photoelectric process. The working mechanism of the PD under 532 nm laser irradiation was carefully investigated, and the minimum identifiable response time of the self-powered PD was 1.5 μs, which is faster than most previously reported PDs with uzomeric nanostructures.

Schematic structure of self-powered PD.Fig.2 Schematic structure of self-powered PD. (Jin, 2021)

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  1. Tu, S., et al. Dual-Encapsulation for Highly Stable All-Inorganic Perovskite Quantum Dots for Long-Term Storage and Reuse in White Light-Emitting Diodes. Chemical Engineering Journal, 2021:128688.
  2. Jin L., et al. Light-induced pyroelectric property of self-powered photodetectors based on all-inorganic perovskite quantum dots. Nanotechnology, 2021.
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