title: Enhanced broadband and omni-directional performance of polycrystalline Si solar cells by using discrete multilayer antireflection coatings.
abstract: The performance enhancement of polycrystalline Si solar cells by using an optimized discrete multilayer anti-reflection (AR) coating with broadband and omni-directional characteristics is presented. Discrete multilayer AR coatings are optimized by a genetic algorithm, and experimentally demonstrated by refractive-index tunable SiO₂ nano-helix arrays and co-sputtered (SiO₂)x(TiO₂)₁₋x thin film layers. The optimized multilayer AR coating shows a reduced total reflection, leading to the high incident-photon-to-electron conversion efficiency over a correspondingly wide range of wavelengths and incident angles, offering a very promising way to harvest more solar energy by virtually any type of solar cells for a longer time of a day.
authors: Department of Materials and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, South Korea.
authors: Seung Jae
authors: SJ
authors: Oh
authors: Sameer
authors: S
authors: Chhajed
authors: David J
authors: DJ
authors: Poxson
authors: Jaehee
authors: J
authors: Cho
authors: E Fred
authors: EF
authors: Schubert
authors: Sung Ju
authors: SJ
authors: Tark
authors: Donghwan
authors: D
authors: Kim
authors: Jong Kyu
authors: JK
authors: Kim
mesh_terms: D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D055095:Optics and Photonics; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D012822:Silicon Dioxide / Q000737:chemistry*; D012993:Solar Energy; D013472:Sunlight; D013499:Surface Properties
chemical_list: D012822:Silicon Dioxide