Journal
MATERIALS LETTERS
Volume 302, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2021.130297
Keywords
PEC water-splitting; Electrochemical impedance spectroscopy (EIS); Er-doped TiO2 photoanode
Funding
- DST, India [BRICS/PilotCall2/IEEE-OSC/2018 (G), CRG/2019/003197]
- CSIR-SRF [09/1001(0031)/2018-EMR-I]
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This study presents the origin of enhanced performance of properties of erbium (Er3+)-doped TiO2 photoanodes in PEC water-splitting devices and DSSC devices, with dielectric measurements supporting the improved conductivity of optimised concentration of Er (0.2% mol)-TiO2. The fabricated PEC devices with Er (0.2% mol)-doped TiO2 photoanode exhibited higher current density and lower charge transfer resistance values compared to undoped TiO2.
The origin of enhanced performance of properties of erbium (Er3+)-doped TiO2 photoanodes used in photoelectrochemical cell (PEC) water-splitting devices and power-conversion efficiency in DSSC devices is presented. Particularly, the dielectric measurements of Er3+-TiO2 conclude that the optimised concentration of Er (0.2% mol)-TiO2 has a better conductivity compared to undoped TiO2. The fabricated PEC devices with Er (0.2% mol)-doped TiO2 photoanode exhibited the higher current density of (9 mu A-cm-2) at 1.2 V vs RHE potential which is approximate to 50% higher than that measured for PEC with undoped-TiO2. This enhancement is corroborated with the EIS measurements presenting lower charge transfer resistance values for devices with Er (0.2% mol)-TiO2.
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