Define the External Quantum Efficiency (EQE) of an LED. Calculate its value for a semiconductor material with refractive index n₂ = 3.6; assuming the refractive index of the air = 1.
External Quantum Efficiency (EQE) of an LED refers to the ratio of the number of photons emitted from the LED into the air (external emission) to the number of electrons injected into the LED. It essentially quantifies the efficiency of an LED in converting electrical energy into light that escapes the device. ___ ______ ___ ________ __________ _________ ________.
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