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Hybrid perovskite light emitting diodes under intense electrical excitation.

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.

SUBMITTER: Kim H

PROVIDER: S-EPMC6244086 | biostudies-other | 2018 Nov

REPOSITORIES: biostudies-other

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Hybrid perovskite light emitting diodes under intense electrical excitation.

Kim Hoyeon H Zhao Lianfeng L Price Jared S JS Grede Alex J AJ Roh Kwangdong K Brigeman Alyssa N AN Lopez Mike M Rand Barry P BP Giebink Noel C NC

Nature communications 20181120 1

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<sup>-2</sup>. At low current density (J < 10 A cm<sup>-2</sup>), we find that the external quantum effici ...[more]

PMID: 30459326

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