Polymer Featuring Thermally Activated Delayed Fluorescence as Emitter in Light-Emitting Electrochemical Cells

Lundberg P, Wei Q, Ge Z, Voit B, Reineke S, Edman L (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Journal of Physical Chemistry Letters American Chemical Society

Book Volume: 11

Pages Range: 6227-6234

Journal Issue: 15

DOI: 10.1021/acs.jpclett.0c01506

Abstract

Semiconducting polymers that feature thermally activated delayed fluorescence (TADF) can deliver a much desired combination of high-efficiency and metal-free electroluminescence and cost-efficient solution-based fabrication. A TADF polymer is thus a very good fit for the emitting compound in light-emitting electrochemical cells (LECs) because the commonly employed air-stabile and few-layer LEC architecture is well suited for such solution-based fabrication. Herein we report on the first LEC device based on a TADF polymer as the emitting species, which delivers a luminance of 96 cd m-2 at 4 V and a current efficacy of 1.4 cd A-1 and >600 cd m-2 at 6 V, which is competitive with the performance of multilayer organic light-emitting diodes based on the same TADF polymer. We further utilize the established sensitivity of the emission of the TADF polymer to its environment to draw conclusions on the exciton populations in host-guest and host-free TADF LEC devices.

Involved external institutions

Umeå University SE Sweden (SE) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) Leibniz-Institut für Polymerforschung Dresden e. V. DE Germany (DE) Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Lundberg, P., Wei, Q., Ge, Z., Voit, B., Reineke, S., & Edman, L. (2020). Polymer Featuring Thermally Activated Delayed Fluorescence as Emitter in Light-Emitting Electrochemical Cells. Journal of Physical Chemistry Letters, 11(15), 6227-6234. https://doi.org/10.1021/acs.jpclett.0c01506

MLA:

Lundberg, Petter, et al. "Polymer Featuring Thermally Activated Delayed Fluorescence as Emitter in Light-Emitting Electrochemical Cells." Journal of Physical Chemistry Letters 11.15 (2020): 6227-6234.

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