One step large-scale preparation of silicon-based efficient solar vapor generators
Boukhvalov D.W. Zhumabay B. Kusherova P. Rakymetov B. Tynyshtykbayev K.B. Serikkanov A.S. Chuchvaga N.V.
3 March 2025Royal Society of Chemistry
RSC Advances
2025#15Issue 96794 - 6802 pp.
In this work, the fabrication of the material for solar vapor generation using porous silicon treated by electrochemical etching, metal-assisted chemical etching, and electrochemical metal-assisted etching is reported. The proposed method does not require high-cost equipment and permits the production of centimeter-sized samples within minutes. Morphologies of the samples have been studied by scanning electron microscopy and X-ray diffraction spectroscopy, and the distribution of the impurities has been observed by dispersive X-ray analysis. First-principles modeling has been used to simulate the effect of nickel dopants on the electronic structure of the silicon matrix. Measurements of Raman spectra demonstrate a colossal increase in the signal intensity for all samples. The estimated vaporization performance of studied samples varies from 4.4 kg m−2 h−1 up to 5.2 kg m−2 h−1, more than four times larger than previously reported for silicon-based SVG systems prepared by more sophisticated techniques. The results of the measurements demonstrate the tiny influence of low-concentration doping on vaporization performance. On the contrary, higher porosity and more significant numbers of defects increase the vaporizing efficiency of studied samples.
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College of Science, Institute of Materials Physics and Chemistry, Nanjing Forestry University, Nanjing, 210037, China
Institute of Physics and Technology, Satbayev University, Ibragimov Str. 11, Almaty, 0500322, Kazakhstan
National Academy of Sciences of the Republic of Kazakhstan Under the President of the Republic of Kazakhstan, Shevchenko Str. 28, Almaty, 050010, Kazakhstan
College of Science
Institute of Physics and Technology
National Academy of Sciences of the Republic of Kazakhstan Under the President of the Republic of Kazakhstan
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