Learning Forum

[Nuaman Kutty]

Hi,

Could you please let me know how can I calculate IQE of a micro LED without having the CHARGE-MQW coupled version of Lumerical? 
For now, I have the spontaneous gain and I-V results of the device and I would like to know how can I solve for IQE using the gain coefficient at specific value of current?

Thankyou.

Regards,
Nuaman 

[Guilin Sun]

Please refer to https://optics.ansys.com/hc/en-us/articles/360042358674-CMOS-Electrical-simulation-methodology

If this is what you want,  It is pure photonic smulation.

From your description, it seems you will need to use CHARGE: https://optics.ansys.com/hc/en-us/articles/360062131614-CMOS-Sensor-Camera-Sensor-Characterization 

When you mention " how can I solve for IQE using the gain coefficient at specific value of current", you mean at steady state with a fixed current, right?  usually people specify voltage since the current is induced quantity.

Plese check the rerefences and see what exactly you want from which simulation. Please note that, FDTD simulation does not consider any current effects, except it causes change of refractive index.

 

[Nuaman Kutty]

 

Thankyou for your reply!

What I am looking for is exactly the micro LED simulation example file (https://optics.ansys.com/hc/en-us/articles/360053540493-Micro-LED). Unfortunately I don’t have the latest license to run the coupled charge-mqw simulation. 

For now, I have the individual results, that is the IV from CHARGE solver and emission at different electricfield corresponding to the IV in the quantum well from MQW solver. So I am looking for the math behind the IQE calculation in the coupled simulation. I hope it is the result called, “CHARGE”,”Integrated”. 
It would be great if you could explain in detail about how the coupled simulation works, what are the calculations made, and How the power v/s current and IQE v/s current is calculated.

 

 

[Guilin Sun]

As the step one mentioned, the coupled simulation calculates optoelectronic figures of merit, such as the IV curve, spontaneous emission power spectrum, and internal quantum efficiency. What we know for MQW is  https://optics.ansys.com/hc/en-us/articles/4408088112915-MQW-Solver-Physics

and for CHARGE I guess you know the physics and the questions solved. Since they do not provide more details, it is hard for me to write more here. What is known is from photonics simulation: 

[1] Title: "CMOS Sensor Camera Sensor Characterization Ansys Optics", URL: https://optics.ansys.com/hc/en-us/articles/360062131614-CMOS-Sensor-Camera-Sensor-Characterization.
[2] Title: "CMOS Green's function IQE method Ansys Optics", URL: https://optics.ansys.com/hc/en-us/articles/360042358614-CMOS-Green-s-function-IQE-method.
[3] Title: "Solar cell methodology Ansys Optics", URL: https://optics.ansys.com/hc/en-us/articles/360042165634-Solar-cell-methodology.

 

I would strongly suggest that you purchase the license. You may try the one-month free license if you have not done so.