Zhao Yiran, Descamps Julie, Le Corre Brieg, Léger Yoan, Kuhn Alexander, Sojic Neso, Loget Gabriel
CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR6226, Univ Rennes, Rennes F-35000, France.
CNRS, Bordeaux INP, ISM, UMR CNRS 5255, University of Bordeaux, Pessac 33607, France.
J Phys Chem Lett. 2022 Jun 23;13(24):5538-5544. doi: 10.1021/acs.jpclett.2c01512. Epub 2022 Jun 13.
Wireless electrochemical systems constitute a rapidly developing field. Herein, photoinduced electrochemiluminescence (PECL) is studied at Si-based closed bipolar electrodes (BPEs) for designing anti-Stokes systems that can convert IR into visible photons, without direct electrical contact. We show that protection of the anodic emitting pole of the BPE allows the triggering of bright and longstanding emission under the synergetic actions of an external bias and IR illumination. Photoactive n- and p-type Si BPEs are studied with front-side and back-side illumination, respectively, and nonphotoactive n-Si BPEs are studied in the dark. Two electrochemiluminescent (ECL) systems ([Ru(bpy)]/TPrA and L-012) are tested, and we show that the onset bias and the anti-Stokes shift can be controlled by the ECL system that is employed. These advances, rationalized by simulations, will be useful for the design of original PECL systems for chemical sensing or photodetection.
无线电化学系统是一个快速发展的领域。在此，我们研究了基于硅的封闭双极电极（BPE）上的光致电化学发光（PECL），以设计能够将红外光转换为可见光光子的反斯托克斯系统，且无需直接电接触。我们表明，对BPE的阳极发射极进行保护，可在外部偏置和红外光照的协同作用下触发明亮且持久的发射。分别对具有正面和背面光照的光活性n型和p型硅BPE以及在黑暗中研究的非光活性n型硅BPE进行了研究。测试了两种电化学发光（ECL）系统（[Ru(bpy)]/TPrA和L-012），并且我们表明起始偏置和反斯托克斯位移可由所采用的ECL系统控制。通过模拟合理化的这些进展将有助于设计用于化学传感或光检测的新型PECL系统。
