Hybrid perovskite light emitting diodes under intense electrical excitation

Hoyeon Kim, Lianfeng Zhao, Jared S. Price, Alex J. Grede, Kwangdong Roh, Alyssa N. Brigeman, Mike Lopez, Barry P. Rand and Noel C. Giebink ()
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Hoyeon Kim: The Pennsylvania State University
Lianfeng Zhao: Princeton University
Jared S. Price: The Pennsylvania State University
Alex J. Grede: The Pennsylvania State University
Kwangdong Roh: Princeton University
Alyssa N. Brigeman: The Pennsylvania State University
Mike Lopez: The Pennsylvania State University
Barry P. Rand: Princeton University
Noel C. Giebink: The Pennsylvania State University

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Hybrid perovskite semiconductors represent a promising platform for color-tunable light emitting diodes (LEDs) and lasers; however, the behavior of these materials under the intense electrical excitation required for electrically-pumped lasing remains unexplored. Here, we investigate methylammonium lead iodide-based perovskite LEDs under short pulsed drive at current densities up to 620 A cm−2. At low current density (J 10 A cm−2), where EQE roll-off is dominated by a combination of Joule heating and charge imbalance yet shows no evidence of Auger loss, suggesting that operation at kA cm−2 current densities relevant for a laser diode should be within reach.

Date: 2018
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DOI: 10.1038/s41467-018-07383-8

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