Nanophotonic Light Trapping Theory for Photovoltaics
Photonics plays an increasingly important role in the design of solar cells. Advanced optical designs at the nanoscale can enhance light-matter interaction and increase sunlight absorption. This technique is generally referred to as light trapping. Light trapping helps to reduce the material cost of solar cells. More importantly, it improves the collection efficiency of photo-generated carriers. This chapter will review the general nanophotonic light trapping theory developed by the authors.