@article{d97868520d864f57826a4c67816be3b9,
title = "Nanosecond-Pulsed Perovskite Light-Emitting Diodes at High Current Density",
abstract = "While metal-halide perovskite light-emitting diodes (PeLEDs) hold the potential for a new generation of display and lighting technology, their slow operation speed and response time limit their application scope. Here, high-speed PeLEDs driven by nanosecond electrical pulses with a rise time of 1.2 ns are reported with a maximum radiance of approximately 480 kW sr−1 m−2 at 8.3 kA cm−2, and an external quantum efficiency (EQE) of 1% at approximately 10 kA cm−2, through improved device configuration designs and material considerations. Enabled by the fast operation of PeLEDs, the temporal response provides access to transient charge carrier dynamics under electrical excitation, revealing several new electroluminescence quenching pathways. Finally, integrated distributed feedback (DFB) gratings are explored, which facilitate more directional light emission with a maximum radiance of approximately 1200 kW sr−1m−2 at 8.5 kA cm−2, a more than two-fold enhancement to forward radiation output.",
keywords = "high-speed operation of PeLEDs, metal-halide perovskites, perovskite light-emitting devices, pulsed operation, transient charge carrier dynamics",
author = "Lianfeng Zhao and Kwangdong Roh and Sara Kacmoli and {Al Kurdi}, Khaled and Xiao Liu and Stephen Barlow and Marder, {Seth R.} and Claire Gmachl and Rand, {Barry P.}",
note = "Funding Information: L. Z. and K. R. contributed equally to this work. This work was supported by the Eric and Wendy Schmidt Transformative Technology Fund, DARPA under Award No. N66001-20-1-4052, the Air Force Office of Scientific Research under Award No. FA9550-18-1-0037, and the National Science Foundation under DMR-1807797. The authors acknowledge the use of Princeton's Imaging and Analysis Center, which was partially supported through the Princeton Center for Complex Materials (PCCM), a National Science Foundation (NSF)-MRSEC program (DMR-2011750). Funding Information: L. Z. and K. R. contributed equally to this work. This work was supported by the Eric and Wendy Schmidt Transformative Technology Fund, DARPA under Award No. N66001‐20‐1‐4052, the Air Force Office of Scientific Research under Award No. FA9550‐18‐1‐0037, and the National Science Foundation under DMR‐1807797. The authors acknowledge the use of Princeton's Imaging and Analysis Center, which was partially supported through the Princeton Center for Complex Materials (PCCM), a National Science Foundation (NSF)‐MRSEC program (DMR‐2011750). Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",
year = "2021",
month = nov,
day = "2",
doi = "10.1002/adma.202104867",
language = "English (US)",
volume = "33",
journal = "Advanced Materials",
issn = "0935-9648",
publisher = "Wiley-VCH Verlag",
number = "44",
}