Basically I want to find the conversion efficiency of the LED that I simulated on Silvaco TCAD. The results which I obtained on Silvaco are attached herewith. Kindly let me know how to calculate its efficiency.
1. Current-Luminous Power Curve
2. Current-Voltage curve (IV curve)
3. Power Spectral Density-Wavelength curves at 3.5 V, 4 V and 5 V
Yes but the efficiency numbers resulting from the data are extremely low (< 0.02 %). Recent LEDs have an efficiency of 10 % and more. Is it a very bad LED technology or a calculation error?
Thanks guys. Here is the new graph that I just simulated. Previous one was just for simulation/analysis purpose. Also pl. note that in Silvaco, currents unit are taken in Amp per micron (A/um). So from the analysis and graph presented just now, I should expect power conversion efficiency to be
Eff=Luminous Power/Input electrical power
Here Luminous power at 5 V = 3.2 W/cm
And Input electric power = (5 V)*(0.00012 A/um) = (5 V)*(1.2 A/cm) = 6 W/cm
So Efficiency=3.2 / 6 = 54% (theoretical)
Is there any way to use Power Spectral density curve as well to get efficiency? Also how I can find External Quantum Efficiency with these graphs? Pics are attached herewith