CsPbBr₃ interconnected microwire structure: Temperature-related photoluminescence properties and its lasing action

Inorganic perovskite CsPbBr₃ is a promising material for the next generation green-wavelength light-emitting devices. In this paper, we report the temperature-dependent photoluminescence properties of the CsPbBr₃ microstructure fabricated by a vapor phase transport method. The temperature-dependent photoluminescence emission spectra show blueshift when the temperature increases from 10 K to 150 K, and then redshift from 150 K to room temperature. The shift in PL demonstrates the collaborative effect of thermal expansion and carrier-phonon interaction. Temperature-dependent time-resolved photoluminescence demonstrates that the PL lifetime increases with the temperature due to exciton thermal dissociation. In addition, lasing action was observed in the trianglular CsPbBr₃ microstructure. The results reveal the thermal effect on the carrier recombination, and indicate that the CsPbBr₃ microstructure has potential application for microlasers.