Research And Preparation Of All-inorganic Perovskite Micro-Nano Lasers

In recent years,perovskite materials represented by organic-inorganic hybrid perovskites have become popular for solar cells because of their long diffusion length,low Auger recombination rate,high carrier concentration,and energy gap matching.The photoelectric conversion efficiency has been raised to more than 20%in just a few years.Many of the physical properties that lead to the increase in the efficiency of perovskite solar cells have also led to an increase in the performance of perovskite light-emitting devices.Perovskite materials have also been used in the field of optoelectronic devices.However,the instability of organic-inorganic hybrid perovskites hinders its development and application.This is where all-inorganic perovskites have become the focus of attention.They also have the excellent optical properties of organic-inorganic hybrid perovskites,while being more stable.The all-inorganic perovskite also has excellent optical absorption properties,can effectively convert light into current,and can be used as an excellent gain material in lasers.Since the advent of the world’s first ruby solid-state laser in the 1960s,lasers have been widely used in many fields of military,science and technology,economic and social development due to their good directionality,high brightness,and good monochromaticity.Profoundly affects people’s lives.Perovskite materials have also shown their unique advantages in practical applications as semiconductor lasers,such as easy preparation,low threshold,and tunability.In this paper,the microcrystalline structure of CsPbBr3 perovskite with different morphology was prepared by chemical vapor deposition method,and a perovskite semiconductor micro-nanolaser with excellent performance was produced.The specific work contents are as follows:1.Introduced the basic structure of perovskite material,its luminescent properties when used as a photoelectric material,and briefly introduced its application.2.The preparation method of perovskite samples was reviewed and introduced.The properties of the perovskite samples prepared by different preparation methods were analyzed.The advantages and disadvantages of the solution crystallization method and the chemical vapor deposition method were carefully calculated according to the needs of the subject.Finally,the sample prepared by chemical vapor deposition method was selected as an experimental sample,and the characterization method was briefly introduced.3.CsPb Br₃ microspheres were prepared by chemical vapor deposition method.The shape and structure of the microspheres were characterized.The temperature-variation properties of the fluorescence spectra were studied,and the temperature expansion and electron-phonon interactions were explained.Finally,a single mode tunable laser with perovskite microspheres was realized.4.In combination with the literature,the organic-inorganic perovskite trigonal pyramid micro-nano laser has been improved to make it more stable and a single-mode laser has been realized.5.The basic theory,properties and applications of surface plasmon polaritons are briefly introduced.Surface plasmon polariton lasers are realized with perovskite nanowires.Perovskite surface plasmon lasers can cross the diffraction limit,have a high spontaneous emission factorβ,high quality factor,and low threshold.