Dynamic Interferometry Lithography on a TiO2Photoresist Sol-Gel for Diffracting Deflector Module

V Gâté,M Langlet,O Parriaux,A Kaminski,F Vocanson,C Veillas,L Berthod,I Verrier,Y Jourlin

doi:10.1155/2017/8548041

Abstract

Solar electricity is one of the most promising renewable energy resources. However, the ratio module’s cost/energy produced remains a major issue for classical photovoltaic energy. Many technologies have been developed to solve this problem, by using micro- or nanostructuring on the solar cell or on the module. These kinds of structuring are often used as antireflection and light-trapping tools. In the meantime, other solar technologies are considered, such as concentration photovoltaic modules. This article presents a module combining both approaches, that is, nanostructures and concentration, in order to increase the module’s profitability. Sol-gel derived TiO2diffraction gratings, made by dynamic interferometric lithography, are added on the top of the glass cover to deflect unused light onto the solar cell, increasing the module efficiency.

Highlights

Micro- or nanostructuring for light-trapping and antireflect coatings has been studied during the last decade in order to increase solar cell and photovoltaic (PV) module efficiency
The technology presented in this paper focuses on diffraction gratings placed on the top of the glass cover to deflect the light to the cell directly or by Total Intern Reflection (TIR)
The aim of the module that we have developed is to decrease the area of PV material for a given efficiency or increase the efficiency for a given area of PV material

Summary

Introduction

Micro- or nanostructuring for light-trapping and antireflect coatings has been studied during the last decade in order to increase solar cell and photovoltaic (PV) module efficiency. New types of concentrator have been studied, which are able to concentrate the light moderately with a concentration factor from 2 to 300 suns [8,9,10,11,12,13] These structures are mostly based on holographic concentrators and diffraction gratings which trap and deflect the incoming light onto the solar cells. This technology led Prism Solar to industrially produce modules based on holographic diffraction gratings trapped between the cover and the back glass, combined with double faces crystalline solar cells. This work will focus on the conception of a PV

Results

Discussion

Conclusion