Plasmonic effects of thermally evaporated aluminum nanoparticles on the electroluminescence of organic light-emitting diode subject to exciplex

Amadou Thierno Diallo; Mahmoud Chakaroun; Samira Khadir; Sarah Hamdad; Juan U. Esparza-Villa; Agnès Maître; Azzedine Boudrioua

doi:10.1117/1.JNP.13.016004

7 February 2019 Plasmonic effects of thermally evaporated aluminum nanoparticles on the electroluminescence of organic light-emitting diode subject to exciplex

Amadou Thierno Diallo, Mahmoud Chakaroun, Samira Khadir, Sarah Hamdad, Juan U. Esparza-Villa, Agnès Maître, Azzedine Boudrioua

Author Affiliations +

Journal of Nanophotonics, Vol. 13, Issue 1, 016004 (February 2019). https://doi.org/10.1117/1.JNP.13.016004

Abstract

We report the investigation of the influence of plasmonic aluminum nanoparticles (Al-NPs), randomly dispersed into the blue organic light-emitting diode (OLED) subject to exciplex emission. The results show that, on the one hand, for the device without Al-NPs, two emission peaks at 437 and 470 nm attributed to excitons of the emitting layer (EML) and exciplexes formed at the hole transport layer/EML interface, respectively. On the other hand, for the device with Al-NPs, the exciplex emission has almost disappeared due to the localized surface plasmonic resonance effect. Moreover, the effective coupling between excitons and localized surface plamson of Al-NPs improved the radiative emission rate of the EML. We observed an enhancement of 50% of the luminous efficiency of the plasmonic-OLED device. In addition to that, the exciton lifetime of the reference sample without metallic nanoparticles is found 1.6 ns, whereas that of the plasmonic sample is prominently decreased to 0.7 ns, emphasizing the plasmonic effect of Al-NPs on the emission of our blue-OLEDs.

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Amadou Thierno Diallo, Mahmoud Chakaroun, Samira Khadir, Sarah Hamdad, Juan U. Esparza-Villa, Agnès Maître, and Azzedine Boudrioua "Plasmonic effects of thermally evaporated aluminum nanoparticles on the electroluminescence of organic light-emitting diode subject to exciplex," Journal of Nanophotonics 13(1), 016004 (7 February 2019). https://doi.org/10.1117/1.JNP.13.016004

Received: 18 September 2018; Accepted: 15 January 2019; Published: 7 February 2019

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