A Spin-Polarised Photovoltaic Module with a Torsion-Set Recombination Ceiling

The module set out in this paper is a spin-polarised photovoltaic module intended for rooftop and field photovoltaic generation. Its operating principle is that a single-junction absorber fitted with a spin-selective contact that preferentially extracts one spin population, modelled as a small recombination reduction applied to the Shockley-Queisser efficiency for its band gap. The design is computed from stated assumptions throughout; it is simulated, not measured, and no prototype results are reported. The headline result is a peak electrical output of 534 W, obtained with incident solar power of 1.6e+03 W with a computed efficiency or performance coefficient of 33.4 per cent where that measure applies, for a unit of mass 11 kg whose characteristic scale is a module area of 1.6 m^2. A parameter sweep reported in the Results section shows how the output moves when the principal variable is changed, and the density of the working material, 2.33e+03 kg per cubic metre, sits about 54.6 orders of magnitude below the neutron-carrier density bound of 9.72e+57 kg per cubic metre, so the bound enters this design as a sizing ceiling and a margin statement rather than as an operating condition. The limitations are stated plainly: the polarisation gain is a modelled six per cent relative improvement and vanishes if the contact does not in fact select spin; the module is otherwise an ordinary panel. Status: SIMULATED, NOT MEASURED.