Efficient light-emitting diodes based on oriented perovskite nanoplatelets

96Citations
Citations of this article
97Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

Solution-processed planar perovskite light-emitting diodes (LEDs) promise high-performance and cost-effective electroluminescent devices ideal for large-area display and lighting applications. Exploiting emission layers with high ratios of horizontal transition dipole moments (TDMs) is expected to boost the photon outcoupling of planar LEDs. However, LEDs based on anisotropic perovskite nanoemitters remain to be inefficient (external quantum efficiency, EQE <5%) due to the difficulties of simultaneously controlling the orientations of TDMs, achieving high photoluminescence quantum yields (PLQYs) and realizing charge balance in the films of assembled nanostructures. Here, we demonstrate efficient electroluminescence from an in situ grown perovskite film composed of a monolayer of face-on oriented nanoplatelets. The ratio of horizontal TDMs of the perovskite nanoplatelet film is ∼84%, which leads to a light-outcoupling efficiency of ∼31%, substantially higher than that of isotropic emitters (∼23%). In consequence, LEDs with a peak EQE of 23.6% are achieved, representing highly efficient planar perovskite LEDs.

Cite

CITATION STYLE

APA

Cui, J., Liu, Y., Deng, Y., Lin, C., Fang, Z., Xiang, C., … Jin, Y. (2021). Efficient light-emitting diodes based on oriented perovskite nanoplatelets. Science Advances, 7(41). https://doi.org/10.1126/sciadv.abg8458

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free