EEVblog #869 - Counting LED Photons!

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How may photons does a LED emit at very low currents?
What is the lowest current where a LED will actually emit photons? Dave does some measurements to answer this quantum physics level stuff!
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Tags:
eevblog
video
led
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quantum physics
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how it works
light emitting diode
photon counter
recombination
bandgap
voltage
band gap
valence band
conduction band
electron
hole
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n-type
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counting