title: Slow-light-enhanced upconversion for photovoltaic applications in one-dimensional photonic crystals.
abstract: We present an approach to realizing enhanced upconversion efficiency in erbium (Er)-doped photonic crystals. Slow-light-mode pumping of the first Er excited state transition can result in enhanced emission from higher-energy levels that may lead to finite subbandgap external quantum efficiency in crystalline silicon solar cells. Using a straightforward electromagnetic model, we calculate potential field enhancements of more than 18× within he slow-light mode of a one-dimensional photonic crystal and discuss design trade-offs and considerations for photovoltaics.
authors: University of New South Wales, School of Photovoltaic and Renewable Energy Engineering, Sydney, New South Wales, Australia. craig.johnson@unsw.edu.au
authors: Craig M
authors: CM
authors: Johnson
authors: Peter J
authors: PJ
authors: Reece
authors: Gavin J
authors: GJ
authors: Conibeer