Fig. 1: Characterization of Si/CoOx photoelectrodes and MnOx counter electrodes.
From: Photovoltage memory effect in a portable Faradaic junction solar rechargeable device
a Cross-sectional SEM of Si/CoOx. b CV curve of a Si/CoOx photoelectrode at the scan rate of 10 mV s−1 during photo charge and dark discharge. c Raman spectra of Si/CoOx. d TOF-SIMS spectra of 18O depth profile in Si/CoOx. e Surface SEM image of MnOx. f CV curve of a MnOx counter electrode at the scan rate of 10 mV s−1 in the dark. g Raman spectra of MnOx. h TOF-SIMS spectra of D depth profile in MnOx. Light source: 1 Sun of simulated solar illumination by a Xe lamp with AM 1.5 G filter (100 mW cm−2), electrolyte: KBi aqueous solution (0.2 M KOH and 0.4 M H3BO3) with pH = 9.
