Here is the patent in full in case anybody wants to read itAlso because experimental evidence is as important as theory lets consider: Green, M. A., Emery, K., Hishikawa, Y., Warta, W., Dunlop, E. D., Levi, D. H., and Ho-Baillie, A. W. Y. (2017) Solar cell efficiency tables (version 49). Prog. Photovolt: Res. Appl., 25: 3–13. doi: 10.1002/pip.2855.
Per the above:
1) The world record as for a "thin" Si cell (at 35 micron its still over 10x thicker than Rayton's claimed cell) is 21.2%±0.4%
Source:
Moslehi MM, Kapur P, Kramer J, Rana V, Seutter S, Deshpande A, Stalcup T, Kommera S, Ashjaee J, Calcaterra A, Grupp D, Dutton D, Brown R. World-record 20.6% efficiency 156?mm?×?156?mm full-square solar cells using low-cost kerfless ultrathin epitaxial silicon & porous silicon lift-off technology for industry-leading high-performance smart PV modules. PV Asia Pacific Conference (APVIA/PVAP), 24 October 2012.
2) The world record for a Si cell in the neighborhood of Rayton's claimed thickness is 10.5%±0.3% for a ~2micron thick cell
Source :
Keevers MJ, Young TL, Schubert U, Green MA. 10% efficient CSG minimodules. 22nd European Photovoltaic Solar Energy Conference, Milan, September 2007.
If Rayton can truly produce a 24% efficient 3 micron thick cell - why are they not flooding the entire internet with their test data?