Mobile ions determine the luminescence yield of perovskite light-emitting diodes under pulsed operation.

ABSTRACT: The external quantum efficiency of perovskite light-emitting diodes (PeLEDs) has advanced quickly during the past few years. However, under pulsed operation, an operation mode which is important for display and visible light communication, the performance of PeLEDs changes a lot and requires in-depth understanding to facilitate these applications. Here, we report the response of PeLEDs under pulsed operation in the range of 10 Hz to 20 kHz. Beyond transient effects in the low frequencies, we find that for higher frequencies (>500 Hz) the transient electroluminescence intensity depends strongly on the duty cycle. This feature is much more pronounced and of different origin than that in conventional LEDs. We rationalise our experimental observations using a mathematical model and assign thes

SUBMITTER: Kumawat NK 

PROVIDER: S-EPMC8361013 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature