Pulsed laser/ electrodeposited CuBi^sub 2^O^sub 4^/BiVO^sub 4^ p-n heterojunction for solar water splitting

CuBi2O4 is regarded as p-type candidate for photoelectrochemical water splitting due to its attractive thermodynamic and band structure features. In this work, we present the optimization of CuBi2O4 thin films synthesized by electrodeposition method on FTO glass substrate. CuBi2O4/BiVO4 heterojuncti...

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Bibliographic Details
Published inSolar energy materials and solar cells Vol. 180; p. 123
Main Authors Liu, Shangpu, Zhou, Jinglan, Lu, Youjun, Su, Jinzhan
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier BV 15.06.2018
Subjects
Band structure
Bismuth oxides
Copper
Diffraction
Electrochemical analysis
Electrochemistry
Electrodeposition
Film thickness
Glass substrates
Heterojunctions
Optimization
P-n junctions
Photoelectric effect
Photoelectric emission
Pulsed laser deposition
Sodium sulfate
Splitting
Thermodynamics
Thin films
Vanadates
Water splitting
X-ray diffraction
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Summary:CuBi2O4 is regarded as p-type candidate for photoelectrochemical water splitting due to its attractive thermodynamic and band structure features. In this work, we present the optimization of CuBi2O4 thin films synthesized by electrodeposition method on FTO glass substrate. CuBi2O4/BiVO4 heterojunction were further fabricated by depositing BiVO4 on CuBi2O4 with pulsed laser deposition method. The influence of parameters such as the electrodeposition time and pulse count of PLD deposition on performance of the heterojunctions was studied. The films were characterized by X-ray diffraction, SEM, UV–Vis and electrochemical properties. The optimal deposition condition for CuBi2O4 sample was found to be electrodeposition for 20 min and annealing at 500 °C for 4 h. Pulse laser deposition (PLD) was used for the first time to deposit BiVO4 on CuBi2O4 to form p-n heterojunction. The photoelectrochemical behavior study of sample with different BiVO4 thin film thickness showed that the optimal photocurrent is − 0.25 mA/cm2 in 0.1 M Na2SO4 (pH = 6), which is doubled comparing to that of the bare CuBi2O4 film.
ISSN:0927-0248