Modifying Electrochemical Doping in Light-Emitting Electrochemical Cells With Gold Nanoparticles.

Authors

Ajay K Poonia, Anton Kirch, Joan Ràfols-Ribé, Lucrezia Catanzaro, Anish Rao, Karol Kołątaj, Vittorio Scardaci, Giuseppe Compagnini, Guillermo P Acuna, Ludvig Edman, Nicolò Maccaferri

Published in

Advanced science (Weinheim, Baden-Wurttemberg, Germany). Pages e78120. Oct 04, 2026. Epub Oct 04, 2026.

Abstract

Electrochemical doping enables dynamic control of organic semiconductors and underpins technologies such as electrochemical transistors, energy-storage, bioelectronic, and light-emitting devices. It is typically governed by the active-material composition or the applied voltage. Here, we show that Au nanoparticles (Au-NPs) incorporated at an electrode interface provide an additional control parameter. Using light-emitting electrochemical cells (LECs) as a model system, we demonstrate that Au-NPs at the anodic interface reshape the electrochemically formed p-n junction, which defines the emission zone. Non-capped Au-NPs shift the emission zone away from the anode, whereas citrate-capped Au-NPs shift it toward the anode. By selecting the appropriate Au-NP type, we reposition the emission zone closer to a region of constructive optical interference, leading to a strong increase in LEC emission efficiency. These results establish interfacial Au-NPs as a strategy to modulate the spatial profile of electrochemical doping and tune the performance of organic electronic devices.

PMID:
42829940
Bibliographic data and abstract were imported from PubMed on 05 Oct 2026.

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