| High-performance perovskite lasing via phase-reconstruction-driven Auger suppression. (a) Schematic diagram of the volatile ammonium-driven phase reconstruction. (b) Schematic diagram of rapid Auger recombination hindering carrier accumulation. (c) Comparison of carrier decay curves extracted from transient absorption (TA) spectra and a laser pulse with a duration on the nanosecond (1 ns) scale. (d) Evolution of PL spectra under various pump fluences under quasi-continuous ns-pumping. Inset: Far-field pattern of the lasing. (e) Integrated intensity as a function of pump fluence. Inset: Lasing spectra with a narrow FWHM of 0.14 nm, indicating a quality factor of 3850. (f) The comparison of lasing thresholds and quality factors of perovskite lasers under ns-pumping). Credit: X. Wang, G. Lu, et al., doi 10.1117/1.AP.7.5.056006. |
