CsPbX3 quantum dot room temperature synthetic method

Abstract

The invention discloses a CsPbX3 quantum dot room temperature synthetic method. The CsPbX3 quantum dot room temperature synthetic method comprises the following steps: dissolving cesium carbonate in alkyl chain organic acid to prepare a cesium precursor; dissolving lead bromide and branched-chain organic ammonium bromide in toluene, and carrying out stirring and dissolution in room-temperature airto obtain a lead precursor; dissolving DDAB (Didodecyl Dimethyl Ammonium Bromide) in the toluene to obtain a DDAB solution; injecting the cesium precursor into the lead precursor and carrying out stirring reaction to obtain an intermediate; adding the DDAB solution into the obtained intermediate, and carrying out stirring reaction to obtain a CsPbX3 quantum dot stock solution; adding the obtainedCsPbX3 quantum dot stock solution into a purifying solvent for centrifugation; then dispersing in an organic solvent to obtain CsPbX3 quantum dots. According to the CsPbX3 quantum dot room temperature synthetic method disclosed by the invention, the CsPbX3 quantum dot with excellent luminescence property is synthesized under room temperature by utilizing the synergism matching of three ligands, the quantum yield of an ink dispersion solution exceeds 90 percent, and meanwhile, the CsPbX3 quantum dot room temperature synthetic method also has radiative recombination of single channels.

Description

technical field [0001] The present invention relates to a kind of CsPbX 3 Synthesis method of quantum dots at room temperature. Background technique [0002] CaB 3 Due to the advantages of high quantum yield, narrow luminescence peak and high thermal stability, quantum dot materials have attracted extensive attention of researchers in recent years. In optoelectronic fields such as LED devices, detectors, and solar cells, CsPbX 3 Quantum dots have performed well and have very broad prospects. At present, the more classic perovskite quantum dots are synthesized by high temperature (usually above 120°C) thermal injection method, which is relatively complicated to operate and requires an inert gas environment. Synthesis of CsPbX at low or room temperature 3 Quantum dots have gradually attracted people's attention, but the currently reported CsPbX synthesized at room temperature 3 Although the quantum yield of quantum dots also meets the requirements, the application effect...

AI Technical Summary

Problems solved by technology

At present, the more classic perovskite quantum dots are synthesized by high temperature (usually above 120°C) thermal injection method, the operation is relatively complicated and requires an inert gas environment

Synthesis of CsPbX at low or room temperature 3 Quantum dots have gradually attracted people's attention, but the currently reported CsPbX synthesized at room temperature 3 Although the fluorescence quantum yield of quantum dots also meets the requirements, the application effect in electroluminescent devices is very poor, and they are often only used in photoluminescence

Images