Fabrication of Quantum Optical Elements with InN Nanoparticles for Quantum Dots Solar Concentrator
Abstract
To enhance the efficiency of luminescent solar concentrators with PV cells made of p-n junction, an optical element made of InN nanoparticle thin layer was fabricated with the quantum dot physical deposition process. The geometric mean diameter and standard deviation of the InN particles were 4.6nm and 1.33, respectively. The particle number density at the surface of the QDSC element was 1.01×1012 particles/cm2. The particle number density was very high comparing with any other studies, however, it was still not high enough to use for our QDSC. The photoluminescence of thin borosilicate glasses fitted the desirable theoretical wavelength of our QDSC absorption spectrum. The longer wavelength the excitation spectrum shifted, the shorter the emission spectrum due to the effect of the InN QDs shifted. The excited PL intensity difference was so larger. Although the completion of our QDSC remained a distant goal, it was found that the conversion efficiency with our QDSC increased 8.5% compared with only one cell. It was thought that the QDSC down-converted wavelength of near-UV radiation not ever being available in solar spectrum became available for the a-Si PV cell.