DataVXACS Applied Materials & InterfacesPaper
journal article·2024-09-25

UV-A Flexible LEDs Based on Core–Shell GaN/AlGaN Quantum Well Microwires

Nuno Amador-Mendez, Fedor M. Kochetkov, Roberto Hernandez, Vladimir Neplokh, Vincent Grenier, Sylvain Finot, Lucie Valera, Jules Duraz, Nikita Fominykh, Elizaveta K. Parshina, Konstantin V. Deriabin, Regina M. Islamova, Etienne Herth, Sophie Bouchoule, François Julien, Malini Abraham, Subrata Das, Gwénolé Jacopin, Dmitry V. Krasnikov, Albert Nasibulin, Joël Eymery, Christophe Durand, Ivan S. Mukhin, Maria Tchernycheva

ACS Applied Materials & Interfaces· Volume 16· Issue 38
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Abstract

Nanostructured ultraviolet (UV) light sources represent a growing research field in view of their potential applications in wearable optoelectronics or medical treatment devices. In this work, we report the demonstration of the first flexible UV-A light emitting diode (LED) based on AlGaN/GaN core-shell microwires. The device is based on a composite microwire/poly(dimethylsiloxane) (PDMS) membrane with flexible transparent electrodes. The electrode transparency in the UV range is optimized: namely, we demonstrate that single-walled carbon nanotube electrodes provide a stable electrical contact to the membrane with high transparency (70% at 350 nm). The flexible UV-A membrane demonstrating electroluminescence around 345 nm is further applied to excite Zn-Ir-BipyPDMS luminophores: the UV-A LED is combined with the elastic luminophore-containing membrane to produce a visible amber emission from 520 to 650 nm. The obtained results pave the way for flexible inorganic light-emitting diodes to be employed in sensing, detection of fluorescent labels, or light therapy.
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Research context

NanomaterialsElectronic materialsComposites

OpenAlex topics: GaN-based semiconductor devices and materials · Ga2O3 and related materials · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Centre de Nanosciences et de Nanotechnologies (C2N), UMR 9001 CNRS, Univ. Paris-Saclay, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France

Alferov University, Khlopina, 8/3, 194021 Saint Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya, 29, 195251 Saint Petersburg, Russia

Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, NPSC, 38000 Grenoble, France

Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France

International Laboratory of Quantum Optoelectronics, HSE University, St. Petersburg 190008, Russia

St. Petersburg State University, 7/9 Universitetskaya nab., 199034 Saint Petersburg, Russia

Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala 695019, India

Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India

Kemerovo State University, Krasnaya Str. 6, Kemerovo 650000, Russia

Funding

Agence Nationale de la Recherche · Russian Science Foundation · National Research University Higher School of Economics · Saint Petersburg State University · Ministry of Science and Higher Education of the Russian Federation

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