材料科学
纳米孔
双层
单层
光电流
吸收(声学)
透射率
可见光谱
光电子学
纳米技术
复合材料
化学
膜
生物化学
作者
Hansang Sung,Sucheol Ju,Chanwoong Park,Jaein Park,Heon Lee
标识
DOI:10.1016/j.jphotochem.2023.115266
摘要
This study designs a dense/porous bilayer-structured BiVO4 photoanode to achieve a high photoelectrochemical (PEC) performance. Monolayer photoanodes have their respective limitations; the dense monolayer BiVO4 (d-BVO) photoanode has high reflectance, and the porous monolayer (p-BVO) photoanode has high transmittance, which limits light absorption. Conversely, the dense/porous bilayer structure maximizes the light-absorption and increases PEC efficiency by combining these layers. The dense and porous layers of the bilayer photoanode (b-BVO) were manufactured using the simple processes of sputtering deposition and solution spin coating, respectively. The light absorption of b-BVO increased to approximately 92 % (at wavelengths of 300–500 nm). This resulted in an increase in the absorption efficiency (ηabs) to 81.4 %, which was 21.9 % and 24.5 % higher than those of d-BVO and p-BVO, respectively. The photocurrent density of b-BVO was 2.43 mA cm−2 at 1.23 V versus a reversible hydrogen electrode, which was 31.4 % and 102.5 % higher than those of d-BVO and p-BVO, respectively.
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