Indeed, this is old, I remember reading about it when I was doing research on quantum dots when I was still doing physics at university. I wonder if it's actual

Indeed, this is old, I remember reading about it when I was doing research on quantum dots when I was still doing physics at university. I wonder if it's actually been used in practice though, as use of "fake white" LEDs is still abundant. Was it too expensive? Inefficient in power or production? A lot of cool new breakthroughs seem to come out and then nothing is ever heard of them again, and I often find myself wondering "whatever happened to that?"