Optimal synthesis of antimony-doped cuprous oxides for photoelectrochemical applications
| Autor: | Sung Hyeon Jung, Yunseok Kim, Joo Sung Kim, Young Dae Yun, Seung Ki Baek, Hyung Koun Cho, Young Been Kim |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Photocurrent Materials science Dopant Inorganic chemistry Doping Metals and Alloys Oxide chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces 021001 nanoscience & nanotechnology Mole fraction 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Antimony chemistry 0103 physical sciences Materials Chemistry Reversible hydrogen electrode Antimony sulfate 0210 nano-technology |
| Zdroj: | Thin Solid Films. 671:120-126 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2018.12.037 |
| Popis: | We investigated the influence of Sb dopant concentration on the structural, electrical, and photoelectrochemical properties of the photocathode cuprous oxide (Cu2O) thin films. The photoabsorber p-type Cu2O films were prepared by electrodeposition in ionic electrolytes including copper sulfate and antimony sulfate at 333 K and pH = 10. The small amount of Sb doping contributes to the fast Cu ion transport to the substrate and ion consumption; consequently, the p-type Cu2O with high crystalline quality can be reproducibly synthesized with high electrical stability. Among the various samples, the mole fraction of c(Sb)/[c(Cu) + c(Sb)] = 0.75 mol% exhibits the best electrical resistivity and improved transparency in the infrared region, which is involved with the fast overlap of the nuclei crystals under 5 nm from the high nuclei density. Additionally, the post-thermal annealed Sb-doped Cu2O sample reveals an enhanced photocurrent of ~0.65 mA/cm2 vs. RHE (reversible hydrogen electrode) without metal catalysts. |
| Databáze: | OpenAIRE |
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