Broadband Solar Wavelength Transformation of Visible Light to Near-Infrared Radiation in ${\rm Ce}^{3+}\hbox {-}{\rm Nd}^{3+}\hbox {-}{\rm Yb}^{3+}$ Triple-Doped Yttrium

We provide a framework for investigating and optimizing broadband solar wavelength transformation of visible light to near-infrared radiation in Ce³⁺-Nd³⁺-Yb³⁺ tripled-doped yttrium aluminum garnet. We study the Ce³⁺-Nd³⁺-Yb³⁺ quantum cutting system through modeling and solving rate and power propagation equations. For the optimized Ce³⁺, Nd³⁺, and Yb³⁺ concentrations under the fixed thickness of doping layer, theoretical power transformation efficiency of 178% and quantum transformation efficiency of 191% are obtained. The amount of near-infrared photon output can be boosted to meet the purpose of potentially enabling a c-Si solar cell with a performance enhancement. Our research will be beneficial to further investigate and design a much more efficient RE multi-doped system of broadband solar wavelength transformation for further increasing photoelectric transformation efficiencies of Si solar cells.