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- W3174202752 abstract "The emergence of BiVO 4 as one of the most promising photoanodes for solar water splitting is largely driven by the success in dopant introduction and optimization to improve its photoelectrochemical performance. To this end, although less commonly used, several trivalent ions (e.g., In 3+ , Gd 3+ ) that substitute Bi 3+ have also been demonstrated to be effective dopants, which can increase the photocurrent of BiVO 4 photoanodes. However, the main factor behind such improvement is still unclear as various explanations were proposed in the literature. Herein, Gd 3+ is introduced to substitute Bi 3+ in spray‐deposited BiVO 4 films, which enables up to a ∼2‐fold photocurrent increase. Further analysis suggests that Gd‐doping enhances the carrier separation in BiVO 4 and does not affect the catalytic and optical properties. Indeed, time‐resolved microwave conductivity measurements reveal that the carrier mobility of BiVO 4 is increased by 50% with the introduction of Gd, while the carrier lifetime is unaffected. This mobility increase is rationalized to be a result of a higher degree of monoclinic lattice distortion in Gd‐doped BiVO 4 , as evident from the X‐ray diffraction and Raman spectroscopy data. Overall, these findings provide important insights into the nature and the underlying role of Gd in improving the performance of BiVO 4 ." @default.
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- W3174202752 date "2021-07-07" @default.
- W3174202752 modified "2023-09-27" @default.
- W3174202752 title "Role of Gd in Enhancing the Charge Carrier Mobility of Spray–Deposited BiVO<sub>4</sub> Photoanodes" @default.
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- W3174202752 doi "https://doi.org/10.1002/solr.202100268" @default.
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