Microstructure Design And Properties Of Hydrophobic Surface Of Monocrystalline Silicon

Materials with hydrophobic structures are widely used in fields such as optics,construction,and transportation that require self-cleaning and drag reduction.Dust always accumulates on its surface when monocrystalline silicon with hydrophilicity is prepared as a solar cell,and it is impossible to perform timely cleaning due to the device problem.Therefore,the research on the hydrophobicity of self-cleaning effects on the surface of monocrystalline silicon is of great significance for the application of single crystal silicon in the field of optics.At present,the correlation between the structural parameters of the hydrophobic structures and the hydrophobicity has not been well studied.Therefore,in this paper,the relevant research and discussion on the hydrophobicity of monocrystalline silicon from theoretical modeling,numerical analysis,experimental verification and simulation had carried out,and a series of guiding and valuable conclusions was obtained.Firstly,Gibbs free energy was combined with microstructure parameter.For the unidirectional array grating microstructure and the bidirectional array square column array structure,the complete infiltration model and air column model related to structural parameters were constructed.In particular,for the structural characteristics of grating structure,the complete infiltration model and the air column model were constructed in the direction of vertical to the grating structure and parallel to the grating structure.According to the numerical analysis of the theoretical model,it was found that the structural parameters have a great influence on the hydrophobicity.Secondly,in order to visually study and verify the influence of structure and structural parameters on the hydrophobicity of materials,a reasonable range of structural parameters was designed by using the constructed prediction model of contact angle.The micro milling technology which can accurately and stably fabricate microstructure was selected to investigate the hydrophobicity of monocrystalline silicon containing microstructures.The experimental results verified the correctness and accuracy of the theoretical model,and the air column model was more in line with the actual situation.Based on theoretical and experimental research,the structure with bidirectional array can achieve better hydrophobicity,and the smaller the width of the boss,the better the hydrophobicity.The contact angle can even reach 165.3° when the width of the boss was 60?m.Finally,from a microscopic perspective,the monocrystalline silicon system containing microstructures was constructed to simulate the wetting properties of water molecules on the surface of monocrystalline silicon.Furthermore,the influence of microstructure on hydrophobic properties was analyzed and investigated.It could be found that the trend on the nanometer scale was consistent with the conclusions and trends of the above experimental and theoretical explorations,and the correctness of the conclusions obtained from the macroscopic experiments and theoretical calculations was verified from the nanoscale.