Research combines the porous structure of silicon with its ability to “trap” incident light.

Electron microscopy of a porous silicon sample. A new paper examines the effect of porous structures on light traps. Credit: SciencePOD

The world is on the verge of major environmental disasters, and the need for renewable energy sources is more urgent than ever. Perhaps the most important source of undeveloped renewable energy is, of course, the sun. It is no wonder that much of the focus of renewable energy research is on solar power.

New paper published in European Physics Journal D Investigate changes in the porous structure of silicon to reduce reflection and make it a suitable material for solar absorption technology. This paper was written by Daohan Ge, Zhou Hu, Zhiwei Fang, Chao Ni, Liqiang Zhang, Institute of Intelligent Flexible Mechatronics, Jiangsu University, China, and Shining Zhu, National Institute of Solids Microstructure, Nanjing University, China.

In paperThe authors found that porous silicon effectively reduces light reflectance, and for its efficiency the optical application efficiency of devices focused on electrochemical etching methods to prepare porous silicon. It points out that it can be used as an excellent optical trap layer material that can be improved and its inexpensive properties.

Currently, porous silicon prepared using electrochemical methods has a reflectance of about 5-10% and a minimum light reflectance of 4.7%. Wavelength range From 300 to 1000 nanometers.

Other studies have investigated the optical trap quality of this silicon, but the difference in this study is the fact that the team links this quality to the porous structure of silicon.

Therefore, the team used the Finite-difference method (FDTD) to calculate and compare the surface reflectance of porous silicon structures of various pore sizes.

What researchers have discovered is that it is porous. Silicon Structures prepared under optimal corrosion parameters can achieve a low average reflectance of 2.3% for light in the incident wavelength range of 300-1000 nm.

They found that pore sizes of 300-700 nm could achieve lower reflectance, adding that this points the way to future low-reflectance design and preparation. Porous silicon Construction.

3D 2D material

For more information:
Daohan Ge et al, Optimization of Porous Silicone Structure as Antireflection Material, European Physics Journal D (2022). DOI: 10.1140 / epjd / s10053-022-00344-3

Quote: The study was conducted on the porous structure of silicon and the incident light obtained from https: // on April 14, 2022 (April 2022). 14th) is linked to the ability to “trap”. html

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Research combines the porous structure of silicon with its ability to “trap” incident light.

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