Semiconductor electrodes. Photo-induced electrogenerated chemiluminescence and up-conversion at semiconductor electrodes

Semiconductor Electrodes: VI . A Photoelectrochemical Solar Cell Employing a Anode and Oxygen Cathode

“…This problem excludes consideration of the variation of conductivity within the thin diffusion layer adjacent to the electrodes and effectively regards the change in potential drop to be determined by the bulk of the solution. Also excluded from consideration is the effect of electrode kinetics, it being assumed that the double-layer capacity is sufficiently large that the potential difference across it does not change during the time of the measurement (8).…”

Luminescence Amplification at BiVO4 Photoanodes by Photoinduced Electrochemiluminescence

“…Moreover, the system fundamentally differs from previous studies where FL was avoided by using an incident wavelength, l exc , higher than the absorption band (l exc > l abs ) of the ECL emitter. [14][15][16] Here, we show that anodic PECL of this system can be induced at a potential as low as À0.4 V to amplify the overall luminescence (i.e. FL + PECL) in a precise manner.…”

“…SC photoelectrochemistry and ECL) opens new possibilities, among which, a considerable decrease in the potential required for light emission and original light conversion schemes. This unique concept, referred to as photoinduced electrochemiluminescence (PECL), has been only demonstrated in a few studies . In PECL, ECL is induced at the surface of an illuminated SC photoelectrode and the incident wavelength that is used to excite the SC ( λ exc ) is converted by the ECL reaction into the emission wavelength ( λ em ).…”

Luminescence Amplification at BiVO4 Photoanodes by Photoinduced Electrochemiluminescence

“…This unique concept, referred to as photoinduced electrochemiluminescence (PECL), has been only demonstrated in a few studies. [14][15][16] In PECL, ECL is induced at the surface of an illuminated SC photoelectrode and the incident wavelength that is used to excite the SC (l exc ) is converted by the ECL reaction into the emission wavelength (l em ). A major challenge of PECL is to overcome the competing photocorrosion mechanisms, which particularly pronounced in aqueous electrolytes and degrade SC electrodes, preventing ECL emission.…”

“…A major challenge of PECL is to overcome the competing photocorrosion mechanisms, which particularly pronounced in aqueous electrolytes and degrade SC electrodes, preventing ECL emission. [17] PECL has been so far reported for designing electrochemically assisted up-conversion systems (l exc > l em ) at Si and III-V SC photoelectrodes using organic luminophores dissolved in dried organic electrolytes, [14,15] or, more recently, in water with the co-reactant system Ru-(bpy) 3…”