Long laminated sub-wave reflection-reducing structure and preparation method thereof

Abstract

The invention discloses a long laminated sub-wave reflection-reducing structure comprising a long sub-wave pattern and a medium layer, wherein the long sub-wave pattern is formed by etching the surface of a material with high refractive index required to reduce the reflection; the medium layer is formed by growing on the surface of the long sub-wave pattern by sediment; the long sub-wave pattern and the medium layer form a long laminated sub-wave structure; and the structural pattern is obtained according to the distribution of the refractive index of the used material and the wavelength and the angle range of incident light required to reduce the reflection. The long sub-wave reflection-reducing structure is applied to an active photoconducting device with high refractive index surface and can really and effectively achieve the transmission effect of a broadband wide angle. Compared with the prior art, the invention can effectively passivate the long laminated sub-wave reflection-reducing structure, reduce non-radiation recombination centers, inhibit the on-radiation recombination loss and effectively increase the corresponding performance of the photoconducting device; in addition, based on the sequential change of the refractive indexes of air, medium materials and substrate materials, by adopting the long laminated sub-wave reflection-reducing structure, the preparation difficulty can be weaken or better reflection-reducing performance can be obtained under the same condition.

Description

technical field [0001] The invention relates to a nanostructure, in particular to a subwavelength antireflection structure suitable for solar cell systems, light display surface emission devices, etc. requiring wide-spectrum and wide-angle incoming and outgoing light and a preparation method thereof, belonging to the field of micro-nano photonics. Background technique [0002] The interface reflectivity between substances with different refractive indices is an important parameter that affects the performance of light-receiving, emitting, and transmitting optical devices and equipment. The extremely low interface reflectivity is pursued in the fields of light display, broad-spectrum light source, solar cell, lens, etc. Important indicators. Typically, vapor-deposited optical anti-reflection coatings are used to reduce optical interface reflections. In order to reduce the interface reflectivity as much as possible in a wide-angle and wide-spectrum range, it is usually necess...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a novel sub-wavelength anti-reflection structure and its preparation method to solve the limitations of the existing sub-wavelength structure in improving the overall performance of the device

Images