Not to be contrary, but for clarity, 'QE' ( 'quantum efficiency') can be near 100%...whereas 'CE' ('conversion efficiency') is the metric most commonly referred to & the one being explored in my questioning. Two different things.
To the rest of your comment; ' maybe', 'maybe not ', I have no idea...but *I promise to get back to you on all that after it becomes more than hypothesis, wishful thinking or conjecture... *even if I have to have to rise from the grave to do it