低反射超疏水太阳能电池表面结构的制备工艺研究-机械电子工程专业论文.docxVIP

华中 科技 大学 华 中 科 技 大 学 硕 士 学 位 论 文 II II Abstract Today the world is facing serious energy and environment pressure, the solar cells has recently become a hot research field . There are some problems of solar cells, such as the low absorption of sunlight and the poor stability affected by abominable environments. Natural organisms have a good adaptability in different environments. Some specific structures of plants and animals directly contribute to the characteristics of optical propagation control, temperature control and self-cleaning. In this study, two kinds of experiment scheme based on the structure principle have been proposed . The main contents and conclusions are listed in the following. Research of the Mechanism of bionic structure. Some organisms have perfect characteristics of hydrophobic and anti-reflection, and the ordered microscopic structures on the surface play a decisive role. Nanowire/pole structures have an important effect on the capabilities of the decontamination for the organisms, while the similar nanowire/pole structures may show excellent optical anti-reflection for another organism. The optical simulation of the nanostructure base on the RCWA theory via RSOFT and MATLAB. The structure parameters of 2D subwavelength grating has an important affect in the optical properties. Wet chemical etching method to fabricate silicon nanowire arrays has been taken. The morphology, hydrophobicity, optical properties of the structures were measured. In the experiments, large-area silicon nanowire arrays was fabricated on the surface of monocrystalline silicon(100) and by a wet chemical etching method at room temperature. This method based on the galvanic cell reaction, SiNW arrays have been realized by chemically depositing Ag nanoparticles on silicon wafers in aqueous HF+AgNO3 mixed etching solution. In the test of these silicon wafers, silicon wafer surfaces consisting silicon nanowire arrays show the characteristics of low-reflection less than 5% i