Solution-processed ZnO/Si based heterostructures with enhanced photocatalytic performance

Chien Hsin Tang, Kai Yu Chen, Chia-Yun Chen

研究成果: Article

5 引文 (Scopus)

摘要

Although hybrid semiconductor nanostructures have shown high potential for optoelectronic applications, great challenges remain owing to the fabrication difficulties of nanoscale heterostructures with sound uniformity based on a solution synthesis. In this study, a facile, large-area and reliable solution-processed deposition was employed, which enabled uniform fabrication of ZnO nanoparticles on silicon nanowire (SiNW) arrays with a high aspect ratio. This was accomplished by the introduction of shear stress at glass/SiNW contacts during baking treatment, which dramatically enforced the lateral migration of Zn2+-containing solutions for nucleation and effectively reduced the expected aggregation at the SiNW tips, forming well-incorporated ZnO/SiNW arrays. Chemical compositions, crystallographic characteristics and photoluminescence analysis were performed to examine the hybrid heterostructures, indicating wide-band absorption capability of light from ultraviolet to visible regions. Furthermore, photocurrent investigations revealed the efficient charge separation of photogenerated electrons and holes, owing to the heterojunction created which reduces the direct charge recombination. Based on these features, the large-area, highly light-absorptive ZnO/SiNW heterostructures possess improved photocatalytic activity for the degradation of organic dyes, and further present sound reliability with retained photodegradation efficiency for cycling use.

原文English
頁(從 - 到)13797-13802
頁數6
期刊New Journal of Chemistry
42
發行號16
DOIs
出版狀態Published - 2018 一月 1

指紋

Silicon
Nanowires
Heterojunctions
Acoustic waves
Fabrication
Photodegradation
Photocurrents
Optoelectronic devices
Shear stress
Aspect ratio
Absorption spectra
Nanostructures
Photoluminescence
Nucleation
Coloring Agents
Agglomeration
Dyes
Semiconductor materials
Nanoparticles
Degradation

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry

引用此文

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abstract = "Although hybrid semiconductor nanostructures have shown high potential for optoelectronic applications, great challenges remain owing to the fabrication difficulties of nanoscale heterostructures with sound uniformity based on a solution synthesis. In this study, a facile, large-area and reliable solution-processed deposition was employed, which enabled uniform fabrication of ZnO nanoparticles on silicon nanowire (SiNW) arrays with a high aspect ratio. This was accomplished by the introduction of shear stress at glass/SiNW contacts during baking treatment, which dramatically enforced the lateral migration of Zn2+-containing solutions for nucleation and effectively reduced the expected aggregation at the SiNW tips, forming well-incorporated ZnO/SiNW arrays. Chemical compositions, crystallographic characteristics and photoluminescence analysis were performed to examine the hybrid heterostructures, indicating wide-band absorption capability of light from ultraviolet to visible regions. Furthermore, photocurrent investigations revealed the efficient charge separation of photogenerated electrons and holes, owing to the heterojunction created which reduces the direct charge recombination. Based on these features, the large-area, highly light-absorptive ZnO/SiNW heterostructures possess improved photocatalytic activity for the degradation of organic dyes, and further present sound reliability with retained photodegradation efficiency for cycling use.",
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Solution-processed ZnO/Si based heterostructures with enhanced photocatalytic performance. / Tang, Chien Hsin; Chen, Kai Yu; Chen, Chia-Yun.

於: New Journal of Chemistry, 卷 42, 編號 16, 01.01.2018, p. 13797-13802.

研究成果: Article

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