Thermal Properties of Polymer Hole-Transport Layers Influence the Efficiency Roll-off and Stability of Perovskite Light-Emitting Diodes

Lianfeng Zhao; Daniel D Astridge; William B Gunnarsson; Zhaojian Xu; Jisu Hong; Jonathan Scott; Sara Kacmoli; Khaled Al Kurdi; Stephen Barlow; Seth R Marder; Claire F Gmachl; Alan Sellinger; Barry P Rand

doi:10.1021/acs.nanolett.3c00148

Thermal Properties of Polymer Hole-Transport Layers Influence the Efficiency Roll-off and Stability of Perovskite Light-Emitting Diodes

Nano Lett. 2023 Jun 14;23(11):4785-4792. doi: 10.1021/acs.nanolett.3c00148. Epub 2023 May 23.

Authors

Lianfeng Zhao^{1

2}, Daniel D Astridge³, William B Gunnarsson¹, Zhaojian Xu¹, Jisu Hong¹, Jonathan Scott¹, Sara Kacmoli¹, Khaled Al Kurdi⁴, Stephen Barlow^{4

5}, Seth R Marder^{4

5

6}, Claire F Gmachl¹, Alan Sellinger^{3

7

8}, Barry P Rand^{1

9}

Affiliations

¹ Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States.
² Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, South Carolina 29634, United States.
³ Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States.
⁴ School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
⁵ Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States.
⁶ Department of Chemical and Biological Engineering, Department of Chemistry, and Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80303, United States.
⁷ Materials Science Program, Colorado School of Mines, Golden, Colorado 80401, United States.
⁸ National Renewable Energy Laboratory, Golden, Colorado 80401, United States.
⁹ Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544, United States.

PMID: 37220025
DOI: 10.1021/acs.nanolett.3c00148

Abstract

While the performance of metal halide perovskite light-emitting diodes (PeLEDs) has rapidly improved in recent years, their stability remains a bottleneck to commercial realization. Here, we show that the thermal stability of polymer hole-transport layers (HTLs) used in PeLEDs represents an important factor influencing the external quantum efficiency (EQE) roll-off and device lifetime. We demonstrate a reduced EQE roll-off, a higher breakdown current density of approximately 6 A cm^-2, a maximum radiance of 760 W sr^-1 m^-2, and a longer device lifetime for PeLEDs using polymer HTLs with high glass-transition temperatures. Furthermore, for devices driven by nanosecond electrical pulses, a record high radiance of 1.23 MW sr^-1 m^-2 and an EQE of approximately 1.92% at 14.6 kA cm^-2 are achieved. Thermally stable polymer HTLs enable stable operation of PeLEDs that can sustain more than 11.7 million electrical pulses at 1 kA cm^-2 before device failure.

Keywords: EQE roll-off; device stability; high power; perovskite light-emitting devices; pulsed operation.