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LED Forty Years Older Than Thought
LED lover writes "The discovery of the LED is usually credited to four US groups in 1962, but an unrecognized Russian genius got there forty years before. Oleg Losev even filed a patent on using his device for long range communications, and wrote to Einstein to ask for help with the theory — but got no reply."
Nope.
Einstein *did* develop the quantum theory in question. He got his Nobel Prize for the photoelectric effect.
Link to the Zheludev paper:
Zheludev, N.I. The life and times of the LED - a 100-year history. Nature Photonics 1(4), 189-192 (2007) pdf file (1.7MB)
Hey now, don't give him crap. He just doesn't know how to use google to actually look up the thing he is ranting about. Heck, the very first search page turns up Tesla Motors, the REVA, and freakin' Global Electric Motorcars, which is a Chrysler company, or even the upcoming Chevy Volt.
Maybe he thinks those electric cars suck (it's ok, a lot of other people think that too - but the Roadster and the Volt look pretty cool to me), he'd rather have a electric Civic or something like that. It's too bad there is a conspiracy to keep people from converting their existing cars to electricity. Oh, wait, no there isn't.
Google is the friend of the ranter... it keeps you from looking retarded.
I have a Ph.D. in semiconductor physics. I worked in one of the labs mentioned in the article. I have to tell you that the description in Nature is really inaccurate. What the Russian likely did is luminesce off a trap in SiC, not off the full bandgap. SiC is not even a direct-bandgap crystal. Yes, it produces blue-green light. It is a point-contact diode, but it is NOT an LED. Nothing practical or useful existed until Nick Holonyak made the first visible LED, then the first visible LED laser a few months later. Bob Hall made the first LED laser. There were a bunch of guys with Ge infrared-emitting diodes before 1962, but history forgets these guys rightly. Both the SiC and Ge diodes are such poor light emitters, that they should not be considered LEDs. Another interesting moment I believe was in the 1960s. Researchers in America claimed to have a working, continuous, non-pulsed room temperature SiC laser. It looked like beautiful blue laser light, but it was a big bust. It was not a laser. Just like this Russian, there was nothing useful going on in SiC.