All-Optical Electrochemiluminescence
Zhao, Yiran (Centre National de la Recherche Scientifique. Université de Rennes. Institut des Sciences Chimiques de Rennes)
Descamps, Julie (Centre National de la Recherche Scientifique. Université de Bordeaux)
al Hoda Al Bast, Nour (Institut Català de Nanociència i Nanotecnologia)
Duque, Marcos (Instituto de Microelectrónica de Barcelona)
Esteve, Jaume (Instituto de Microelectrónica de Barcelona)
Sepúlveda, Borja (Instituto de Microelectrónica de Barcelona)
Loget, Gabriel (Centre National de la Recherche Scientifique. Université de Rennes. Institut des Sciences Chimiques de Rennes)
Sojic, Neso (Centre National de la Recherche Scientifique. Université de Bordeaux)

Data:	2023
Resum:	Electrochemiluminescence (ECL) is widely employed for medical diagnosis and imaging. Despite its remarkable analytical performances, the technique remains intrinsically limited by the essential need for an external power supply and electrical wires for electrode connections. Here, we report an electrically autonomous solution leading to a paradigm change by designing a fully integrated all-optical wireless monolithic photoelectrochemical device based on a nanostructured Si photovoltaic junction modified with catalytic coatings. Under illumination with light ranging from visible to near-infrared, photogenerated holes induce the oxidation of the ECL reagents and thus the emission of visible ECL photons. The blue ECL emission is easily viewed with naked eyes and recorded with a smartphone. A new light emission scheme is thus introduced where the ECL emission energy (2. 82 eV) is higher than the excitation energy (1. 18 eV) via an intermediate electrochemical process. In addition, the mapping of the photoelectrochemical activity by optical microscopy reveals the minority carrier interfacial transfer mechanism at the nanoscale. This breakthrough provides an all-optical strategy for generalizing ECL without the need for electrochemical setups, electrodes, wiring constraints, and specific electrochemical knowledge. This simplest ECL configuration reported so far opens new opportunities to develop imaging and wireless bioanalytical systems such as portable point-of-care sensing devices.
Ajuts:	Agencia Estatal de Investigación PCI2019-111896-2 Agencia Estatal de Investigación PID2019-106229RB-I00
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Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	All optical ; Analytical performance ; Electrical wires ; Electrochemicals ; Electrochemiluminescence ; Electrode connections ; External power supplies ; Fully integrated ; Monolithics ; Optical wireless
Publicat a:	Journal of the American Chemical Society, Vol. 145, Issue 31 (August 2023) , p. 17420-17426, ISSN 1520-5126

DOI: 10.1021/jacs.3c05856

Postprint 10 p, 603.6 KB

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