飞秒激光调控钙钛矿量子点玻璃的析晶和光学性能研究进展

Research Progress in Crystallization and Optical Properties of Perovskite Quantum Dot Glasses Regulated by Femtosecond Laser

全无机铯铅卤(CsPbX_(3),X=Cl,Br,I)钙钛矿量子点玻璃因为其强光吸收系数、高荧光量子效率、可调的能带宽度和较高的载流子迁移效率等优异的光学性能,受到研究者们的广泛关注。超短脉冲激光即飞秒激光加工透明材料已被证明是构建三维光子器件结构的有效方法,在非线性光学、光学数据存储和纳米光子学等领域有着广泛的应用。本文根据飞秒激光与钙钛矿量子点玻璃相互作用,综合介绍了飞秒激光调控钙钛矿量子点玻璃的析晶和光学性能研究进展,并为飞秒激光作用钙钛矿量子点玻璃的未来的研究和应用提供了新的思路和见解。

All inorganic cesium lead halide(CsPbX_(3),X=Cl,Br,I)perovskite quantum-dots(PQDs)form exhibit exceptional optical and electrical properties,such as high quantum yield(QY),high purity,tunable emission wavelength,high defect tolerance,and fast charge carrier diffusion rates.These attributes render them promising for a wide range of applications in photovoltaics,light-emitting diodes(LEDs),photodetectors,lasers,and other optoelectronic devices.However,perovskite quantum dots are prone to degradation due to their ionic structure and high surface energy when exposed to oxygen,moisture,high temperatures,and intense light.In order to enhance their stability and maintain high luminescence efficiency,researchers have begun to incorporate these CsPbX_(3) quantum dots into high-transparency glass substrates with excellent thermal,mechanical,and chemical stability.In recent years,many researchers have successfully synthesized PQDs embedded glass systems such as silicate,germanate,tellurite,phosphate,and borate,and applied them extensively in fields such as optical sensing,X-ray imaging,lasers,optical information storage,and optical anti-counterfeiting.Common methods for preparing PQDs embedded glass include melt-quenching,mechanical stress-induced,and water-induced methods.Both thermal treatment methods fail to localize crystallization,while stress-or water-induced crystallization detrimentally affects the glass structure and introduces toxicity from surface heavy metal Pb,significantly limiting their application prospects.Conversely,ultra-short pulse laser,femtosecond laser processing of transparent materials,has been demonstrated as an effective means to construct three-dimensional photonic device structures,finding wide applications in nonlinear optics,optical data storage,and nanophotonics.Femtosecond laser interact with transparent materials via multiphoton absorption,circumventing the need to consider material absorption or introduce new absorption centers,and the highly localized energy of focused ultra-short pulse laser is achieved.The high spatial resolution of this processing is realized by the rapid redistribution of atoms at the laser focus induced by successive nonlinear optical processes.This technique has been successfully applied to introduce microcracks,alter microzone refractive indices,and form nanocrystals.Compared to traditional methods for preparing perovskite quantum dots,femtosecond laser is more suitable for precipitating perovskite quantum dots within transparent glass materials.This article provides a comprehensive overview of the progress made in studying the crystallization and optical properties of CsPbX_(3) PQDs embedded glass under femtosecond laser irradiation,and offers new ideas and insights for future research and application of PQDs embedded glass regulated by femtosecond laser.Summary and prospects Coating PQDs in transparent glass media has greatly enhanced stability while maintaining excellent optical properties,attracting widespread attention from researchers in recent years.Utilizing femtosecond laser technology enables the manipulation of crystallization behavior of perovskite quantum dot glass in three-dimensional space,which holds significant implications for three-dimensional optical information encryption and storage.Additionally,the interaction between femtosecond laser and PQDs embedded glass enables reversible luminescence,laser emission,polarization,and long persistent luminescence properties,significantly expanding the application domains of PQDs embedded glass.However,there are still many challenges in the direction of femtosecond laser and PQDs embedded glass that researchers need to explore and resolve:using femtosecond laser to fabricate perovskite waveguides or single crystals in glass,potentially endowing inorganic glass with optoelectronic properties;designing and fabricating lead-free perovskite glass using femtosecond laser to further investigate its optical applications while maintaining non-toxic high optical performance;utilizing femtosecond laser as pump sources to achieve laser output from PQDs embedded glass at room temperature;designing specific optical devices and principles to further reduce the size of PQDs written inside glass to the nanometer scale using femtosecond laser,greatly enhancing three-dimensional optical information storage capacity,etc.It is believed that in the near future,PQDs embedded glass under the influence of femtosecond lasers will lead us into a brand-new optoelectronic world.