"magical"? Tesla achieved this in 1896, some 12 yrs after the first PV (daytime) cell was created.
converting interstellar radiation (just above the visible spectrum) into electromotive force.
Problem I have with your response is:
with accuracy and sense .
1. Accuracy
the condition or quality of being true, correct, or exact; freedom from error or defect; precision or exactness; correctness
I need from you if possible method and means of conversion, the procedure of conversion where
a.form of energy used for conversion is specified
b. form of energy converted is specified
So far I do not even have from you the discription about "end product"- (
b)

?
Electromotive force, also called emf is the voltage developed by any source of electrical energy such as a battery or dynamo. .
Force is not an energy.
Voltage is only indicator of potential difference or potential energy but it is not not an energy.
In certain conditions EMF could be a general name for a
device:A
device that supplies electrical energy when it is s called electromotive force or
emf. would be the one that in this particular understanding of device will-(Emfs) convert chemical, mechanical, and other forms of energy into electrical energy.
[3] The product of such a device is also known as
emf.
https://en.wikipedia.org/wiki/Electromotive_force---------------------------------------------------------------------------------------------
ad. 1b.
document :The Interstellar Radiation Field - Springerspecifies many types of radiation.
2.2 Radio-Frequency Integrated Radiation - radio-frequency radiation comes from extragalactic sources,
2.2.1 Bremsstrahlung Radiation -This is a kind of continuum radio radiation emitted by a plasma through free–free
transitions of H and He ions
2.2.2 Synchrotron Radiation (Magnetobremsstrahlung) -nonthermal radiation, emitted by relativistic electrons being
deflected by the magnetic field of the interstellar medium.
2.3 Cosmic Background Radiation
residual signal whose nature was unknown , a team of Princeton
University predicted that some radiation should be observed at that exact wave-
length, as a result of theoretical models for the formation of the Universe. This
radiation would essentially be the remnant of the Big Bang, the explosion that gave
birth to the Universe. According to this prediction, the radiation field would be
isotropic and would correspond to a blackbody microwave emission with temperature of around 2.7 K.
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sense:
(to be clear and easy to understand: )
if 1a is not specified than 1b is not substantiated and does not have form of understanding designed and applied
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conclusion;
-With all do respect my friend information posted by you does not have format accessible without heavy digging for additional pieces.
The best example of accessible post is my post.
a. all essential elements are listed
b. all essential elements have links for accurate explanation and processing.
by that your post fails into category of casual sounds made by need of serving casual purpose.
However I find it interesting as my attention was focused on it and I started to approach it from different perspectives ( also random and not specified)
Wesley