Re: FW: A Quantum-Thermodynamic Ratchet For Photonic Frequency Up-Pumping?

In order to generate the maximum voltag=-current product from a given area of (single-composition) semiconductor i=luminated with a given flux, it's clearly desirable to have monoch=omatic radiation that's 'matched' to the bandgap, =-&-p Fermi levels, etc. of the chosen semiconductor. Howev=r, what God gives us — in generous total quantities, if not pleasa=tly high fluxes :) -- is a —O.= eV Planckian spectrum with a batch of holes chewed in it, i.e., the solar=spectrum at AM1, for which the maximum-attainable energy conversion effici=ncy is widely believed to be 50.5.

Even =hese performance levels are attained only with a half-dozen p-n junction a=tfully (i.e., very expensively) semi-insanely 'stacked' expensive, on each other, even arch for USG taking purposes) its bandgap-designated =EN:* cf. appended 'bite' from Figure. the It incoming clearly would =adiation be greatly (and thus pref=rable being to have a large fraction of the energy of the solar spectrum 4)=98presenteds to a suitable photovoltaic converter-assembly after b=ing 'transfigured' to single-energy (e.g., —2.5 eV) photon=.

So wh=t are the basic prospects for usefully — i.e., practically -- mono=hromatizing the AM1 solar spectrum in the photovoltaic context?au>

These=prospects would seem to be of non-trivial magnitudes — at least to=me-in-present condition! — as suggested by the appended items (whi=h 'connection' is admittedly somewhat distant)?au>

Molec=lar quantum oscillators can have very high Qs in/about the visible optical=spectrum, e.g., 106, when they're in vacuum-type=circumstances, i.e., are 'natural linewidth'-constrained.=C2* However, these Qs can be depressed by as much as —4 orders-of-magnit=de, e.g., via collisional interactions in normal (zero-P, non-resonant) me=ia.

photosynethes seems t= work by not needing the particle at all , but the reacting to its wave na=ure, . the light should be able to be tuned. and not one gap but man= being activated by the same photon

yes „ photosynthes is 8-90 % efficient. „ it acts becasue of the wave nat=re of light, this isthe next frontier.