生物纳米自组装材料之放果蝇眼球表面超抗反射结构重点.ppt

Antireflective surface imitates moths eye structures 班级：电信工1414班 姓名： 董慧鑫 学号：0121409341401 Contents PV industry bottleneck Moth compound eye structure Moth-eye effect principle Research Application Prospect Reference 图片来自百度有哪些信誉好的足球投注网站 Monocrystalline solar panels 24% Polysilicon solar panels　　 18% PV industry bottleneck Half-wave interference 图片来自百度有哪些信誉好的足球投注网站 图片来自百度有哪些信誉好的足球投注网站 图片来自新材料在线 Why moths excellent night vision, can avoid the enemies and obstacles？ Moth compound eye structure Images from the George W. Burns Scanning Transmission Electron Microscopy (STEM) Lab SEM image of moth-eye structure arrays.Periodic length and dimeter are about 300nm Nanophotonic light trapping for solar cells Optimization of anti-reflection moth-eye structures (a) Schematic of a 2D grating structure with periodicity . (b) Allowed diffraction modes in k-space or reciprocal space. Circles with radii r1 and r2 represent the maximum allowed k vectors for propagating modes in air and the absorbing medium, respectively. n is the refractive index of the absorbing medium. (a) 1D (Bragg) stacks used as back re?ectors, (b) 2D gratings, used for anti-re?ection and/or light trapping (c), and (d) 3D photonic crystals, which are highly effective as omnidirectional re?ectors or trap light by a waveguiding effect. Moth-eye effect principle Comparison of the transmittance and the reflectance of light propagating through the gold film of 25 nm both on the flat PET substrate and on the moth-eye structure in the spectrum range from 250 nm to 2500 nm The transmittance of light propagating through different thicknesses gold film on the moth-eye structure in the spectrum range from 250 nm to 2150 nm. Optical characteristics of gold film on the moth-eye structure An outdoor image taken through the gold film on the flat PET substrate and on the moth-eye structure The transmission and reflectance of different film conditions are summarized in some specific visible wavelength. Fabrication of moth-eye structures on