Fig. 3: Photoluminescence quantum yield of pristine and passivated NPLs.
From: Direct linearly polarized electroluminescence from perovskite nanoplatelet superlattices
a, Power density-dependent PLQY (405 nm continuous-wave laser excitation). b, Power density dependence of the integrated PL peak intensity. \({I}_{{\rm{PL}}}\propto {P}^{k}\), where k is the exponent. When k is close to 1, radiative recombination proceeds in a monomolecular manner, consistent with the behaviour of excitons. c, Short timescale (0–2 ns) TAS measurements of the ground-state bleach. Excitation was with a 400 nm wavelength pump laser, 301.5 µJ cm−2 pulse−1 fluence and a 595 nm wavelength probe. All samples were in colloidal solution, measured in a cuvette with a 1-mm-thick cavity.
