title: Using colloidal lithography to fabricate and optimize sub-wavelength pyramidal and honeycomb structures in solar cells.
abstract: The external quantum efficiency of solar cells can be improved by using texturing pyramid- and honeycomb-like structures with minimum reflection. In this study, we investigated the reflection properties of texturing structures through rigorous coupled-wave analysis and the three-dimensional finite-difference time domains (FDTD) method to analyze close-packed texturing structures. We also demonstrate a simple method-combining sub-wavelength-scale monolayer and bilayer polystyrene spheres with a one-step reactive ion etching process-to fabricate optimized pyramid- and honeycomb-shaped antireflection structures, respectively. Thus, sub-wavelength pyramidal and honeycomb-like structures displaying low reflectance were obtained readily without the need for any lithography equipment.
authors: H L
authors: HL
authors: Chen
authors: S Y
authors: SY
authors: Chuang
authors: C H
authors: CH
authors: Lin
authors: Y H
authors: YH
authors: Lin