Inorganic lead halide perovskite quantum dot, preparation method of quantum dot, nanowire and preparation method of nanowire

Abstract

The invention provides an inorganic lead halide perovskite quantum dot, a preparation method of the quantum dot, a self-assembly nanowire and a preparation method of the nanowire. The preparation method of the inorganic lead halide perovskite quantum dot comprises the steps of adding cesium carbonate, lead halide, oleic acid, oleylamine and octadecene into a container to form a precursor solution,allowing a mole ratio of cesium carbonate to lead halide to be 1:(2-4), allowing a volume ratio of oleic acid, oleylamine and octadecene to be 1:1:(18-22), when adding 1mmol cesium carbonate, adding0.5ml oleic acid correspondingly, performing ultrasound treatment on the precursor solution, and centrifuging the precursor solution to form supernate, namely dispersing liquid of the inorganic lead halide perovskite quantum dot. The method is simple in preparation process, low in energy consumption, high in yield and facilitates massive production.

Description

technical field [0001] The invention relates to the field of perovskite materials, in particular to an inorganic lead halide perovskite quantum dot and a preparation method, a self-assembled nanowire and a preparation method. Background technique [0002] Since its independent development from the field of dye-sensitized solar cells in 2009, organic-inorganic hybrid lead halide perovskite materials (APbX3, A=FA, MA; X=Cl, Br, I) have been widely used in solar cells. and other fields. In addition to its low-cost solution synthesis, the biggest advantage of this type of material is its high spectral absorption efficiency >104cm-1, long carrier diffusion distance >100 [0003] nm, small electron-hole effective mass 0.069-0.25m 0 , and the relatively low carrier defect density have attracted widespread attention. However, its small exciton binding energy at room temperature and its extreme sensitivity to humidity, oxygen and heat limit its large-scale application. [0...

AI Technical Summary

Problems solved by technology

Huge energy consumption, long time-consuming, low repeatability

Although the supersaturated recrystallization method gets rid of the harsh conditions such as high temperature and inert gas protection, its extremely low reaction yield makes it impossible to synthesize cubic phase CsPbI that is unstable at room temperature. 3 And other fatal shortcomings also limit its wider application

[0006] Therefore, the prior art has the problems of cumbersome, complex, high energy consumption, low output, and unfavorable industrialization in the process of preparing inorganic metal lead halide perovskite quantum dots.

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