Highly-antireflective porous Si films prepared with metal-assisted chemical etching

Chan Chia Chang, Yu Rui Liu, Chia Yun Chen

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)

摘要

Porous Si films were successfully prepared with a metal-assisted chemical etching (MaCE) process with isopropyl alcohol as solvents at room temperature. The as-prepared Si films on the p-type Si substrates exhibit a quite narrow distribution of pore size and the average dimension of nanopores is found to be 26.7 nm, following a typical Gaussian distribution. Investigations on etching rates, temperature-dependent kinetics and formation mechanism were performed. It is found that the thickness of porous films linearly increases with the etching time covering from 80 nm to 6.5 μm in thickness, demonstrating a sound controllability for the preparation of the porous Si layers. Furthermore, the reflectivity within visible spectrum of these porous films is found to be significantly reduced in comparison with the conventional alkaline-textured Si. By quantitatively comparing the antireflection behaviors of Si porous films synthesized upon various etching durations, the best antireflection capability of Si porous layers is prepared through 20-min MaCE reaction with average reflectance value of 0.5%.

原文English
頁(從 - 到)232-236
頁數5
期刊Surface and Coatings Technology
303
DOIs
出版狀態Published - 2016 10月 15

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 凝聚態物理學
  • 表面和介面
  • 表面、塗料和薄膜
  • 材料化學

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