Fig. 9: Application of perovskite NCs lasers and sensors.

a Schematic diagram of the MAPbBr₃ NCs-based laser device. b PL emission spectrum of the laser under 800 nm laser excitation. c Typical SEM image of silica microspheres coated with CsPbBr₃ NCs on a glass substrate. d Emission intensity and linewidth of the dominant emission peak as a function of pump fluence. e Fluorescence spectra of chloride solutions with concentrations ranging from 0 to 3.0% under 365 nm UV excitation. f Working curve illustrating the fluorescence wavelength shift of chloride detection in the concentration range of 0-3.0%. g Response and recovery curves of pristine Cs₄PbBr₆ NCs and washed Cs₄PbBr₆ NCs. h Schematic of the luminescence mechanism in co-doped Cs₂AgInCl₆ NCs. i S_a and S_r values for Cs₂AgInCl₆ NCs co-doped with 7% Tb³⁺, 20% Ho³⁺, and 1% Bi³⁺. a, b Reproduced with permission from ref. ¹³⁴. Copyright 2021, American Chemical Society; c, d Reproduced with permission from ref. ¹³⁵. Copyright 2021, IOP Publishing; e, f Reprinted under the terms of the Creative Commons CC-BY License from ref. ¹³⁸; g Reproduced with permission from ref. ¹³⁹. Copyright 2024, Elsevier; h, i Reproduced with permission from ref. ¹⁴⁰. Copyright 2024, Elsevier.