A solid-state integrated photo-supercapacitor based on ZnO nanorod arrays decorated with Ag2S quantum dots as the photoanode and a PEDOT charge storage counter-electrode

D Solís-Cortés; E Navarrete-Astorga; R Schrebler; J J Peinado-Pérez; F Martín; J R Ramos-Barrado; E A Dalchiele

doi:10.1039/c9ra10635a

A solid-state integrated photo-supercapacitor based on ZnO nanorod arrays decorated with Ag₂S quantum dots as the photoanode and a PEDOT charge storage counter-electrode

RSC Adv. 2020 Feb 6;10(10):5712-5721. doi: 10.1039/c9ra10635a. eCollection 2020 Feb 4.

Authors

D Solís-Cortés¹, E Navarrete-Astorga¹, R Schrebler², J J Peinado-Pérez¹, F Martín¹, J R Ramos-Barrado¹, E A Dalchiele³

Affiliations

¹ Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain dsolis@uma.es +34 952131920.
² Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso Casilla 4059 Valparaíso Chile.
³ Instituto de Física, Facultad de Ingeniería Herrera y Reissig 565, C.C. 30 11000 Montevideo Uruguay.

Abstract

A planar solid-state photocapacitor with two electrodes has been prepared for the first time using a passivated film of ZnS with Ag₂S quantum dots deposited on ZnO nanorods, which were electrochemically grown on ZnO seed layers, as the photoanode. The supercapacitor part is composed of a electrodeposited poly(3,4-ethylene-dioxythiophene) PEDOT film as the counter-electrode and an ionic liquid-based electrolyte between them deposited by the dip coating method. The different nanostructures and electrodes were morphologically and structurally characterized, and the device was electrochemically characterized and could reach a potential of 0.33 V during photocharge and a storage efficiency of 6.83%.