METHOD FOR MEASURING THE INTERNAL QUANTUM YIELD OF AN LED Russian patent published in 2023 - IPC H01L33/00 

FIELD: LEDs.

SUBSTANCE: method for measuring the internal quantum yield of a LED, according to which an electric current is passed though the LED and, at a given value of constant current, from the range of currents corresponding to an increase in the internal quantum efficiency of the LED, the power of the optical emission of the LED is measured; it is measured at several arbitrarily selected values of the electric current I_k, which are in the range of currents corresponding to the increase in the internal quantum efficiency of the LED, the experimental watt-ampere characteristic obtained P_k(I_k) is approximated by the least-squares method by a function of the form based on the approximation results, the parameters m and q of the approximating function are determined, and the value of the internal quantum output η of the LED at an arbitrary value of the current in a given range is calculated by the formula

EFFECT: reduction of hardware costs, laboriousness and measurement time, as well as expansion of the functionality of the method.

1 cl, 2 dwg