Work

Dielectric particle and void resonators for thin film solar cell textures

Year: 2011

Type: article

Abstract: Using Mie theory and Rigorous Coupled Wave Analysis (RCWA) we compare the properties of dielectric particle and void resonators. We show that void resonators-low refractive index inclusions within a high index embedding medium-exhibit larger bandwidth resonances, reduced peak scattering intensity, different polarization anisotropies, and enhanced forward scattering when compared to their particle (high index inclusions in a low index medium) counterparts. We evaluate amorphous silicon solar cell textures comprising either arrays of voids or particles. Both designs support substantial absorption enhancements (up to 45%) relative to a flat cell with anti-reflection coating, over a large range of cell thicknesses. By leveraging void-based textures 90% of above-bandgap photons are absorbed in cells with maximal vertical dimension of 100 nm.

Source: Optics Express

DOI: 10.1364/oe.19.025729

Authors: Sander A. Mann, Richard R. Grote, Richard M. Osgood, Jon A. Schuller

Institution: Columbia University

Language: English

Topic: Thin-Film Transistor Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: U.S. Department of Energy