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

Autor: Zhao L; Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States.; Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, South Carolina 29634, United States., Astridge DD; Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States., Gunnarsson WB; Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States., Xu Z; Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States., Hong J; Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States., Scott J; Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States., Kacmoli S; Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States., Al Kurdi K; School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States., Barlow S; School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.; Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States., Marder SR; School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.; Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States.; Department of Chemical and Biological Engineering, Department of Chemistry, and Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80303, United States., Gmachl CF; Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States., Sellinger A; Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States.; Materials Science Program, Colorado School of Mines, Golden, Colorado 80401, United States.; National Renewable Energy Laboratory, Golden, Colorado 80401, United States., Rand BP; Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States.; Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544, United States.
Jazyk: angličtina
Zdroj: Nano letters [Nano Lett] 2023 Jun 14; Vol. 23 (11), pp. 4785-4792. Date of Electronic Publication: 2023 May 23.
DOI: 10.1021/acs.nanolett.3c00148
Abstrakt: 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.
Databáze: MEDLINE