Fig. 1. Thermal injection synthesis of perovskite nanocrystals

Fig. 2. X-ray diffraction patterns of CsPbBr₃ nanocrystals

Fig. 3. Structural properties of CsPbBr₃ perovskite nanocrystals films

Fig. 4. Structure diagram of electron beam pumping

Fig. 5. Electron beam pumping effect of perovskite nanocrystals at different voltages

Fig. 6. Variation characteristics of laser threshold and FWHM of 300 nm CsPbBr₃ nanocrystals film

Fig. 7. Laser properties of CsPbBr₃ nanocrystals with different film thickness pumped by electron beam

Fig. 8. The transient optics characteristics of nanocrystals film

Fig. 9. Schematic diagram of random lasing mechanism of electron beam pumped CsPbBr₃ nanocrystals