Extended Data Fig. 10: Analysis of aged control and treated LEDs.
From: Long-range order enabled stability in quantum dot light-emitting diodes
a,b, TOF-SIMS depth profiles of the control (a) and treated (b) CsPbBrxI3−x LEDs before (a,d) and after electrical stress (continuous electrical aging at 1000 cd m−2 for 30 min) (b,e). c,d, Scheme illustrating the Br/I migration to the adjacent layers in control and the suppressed Br/I ion migration in the treated LEDs. e,f, EL spectra of original and control LEDs held at a current density of 10 mA cm−2 for 30 min. g, EL spectra of treated LEDs held at different current densities.
