Wavelength Conversion Material by Quantum Cutting toward Highly Efficient Photovoltaic Generation
Setsuhisa Tanabe
Professor, Graduate School of Human and Environmental Studies, Kyoto University
http://www.h.kyoto-u.ac.jp/staff/342_tanabe_s_0_e.html
Abstract
We will develop wavelength-conversion material through the quantum-cutting of high-energy photons of solar spectrum. If the material absorbs most of the photons with wavelength less than 0.5μm and cut into double number of photons of 1μm, it will be possible to generate the electron-hole pairs in c-Si cell with higher efficiency. The quantum cutting is a wavelength conversion phenomenon by utilizing the electronic energy levels of some lanthanide ions. Our target is to develop a wavelength convertor with 200% quantum efficiency, which absorbs ultra-violet to blue light of the solar spectrum.