You can measure IPCE as you define it. You need to have an optical source with known spectral power emission such as AM1.5 normally used for solar cell s measurement. Then you analyse this solar radiation source with a spectrum analyser which passes a specific radiation bandwidth in photoflux per cm^2/ wavelength interval dlambda Phi(lambda). The spectrally analysed light is incident on the solar cell and the resulting collected shortcircuit current is measured by an a suitable DC ammeter let us denote this current by Jph(lambda). Dividing this current by the electronic charge will give the the number of collected electron hole pairs due to Phi(lambda).

IPCE will be = Jph(lambda)/Phi(lambda)

Best wishes

I would like to thank dear Abdelhalim Zekry for your immediate response

1) IPCE can be calculated by: IPCE=Jph*h*c/(Pin*e*lambda)

2) Simply, IPCE=I/(Pin*lambda)*1.2402*10^8, where I is the current from I-V curve in unit of A, Pin is the light power in unit of mW, lambda in unit of nm.

3) This equation can be used to calculate IPCE for different voltages from I-V curve data.

Hope this helps anyone in need.

Dear Zhaojue Lan, Kindly provide me the references if any for the above clarification. When I gone through the literature, I found that IPCE=I/(Pin*lambda)*1240 instead of 1.2402*108 (Ref: Fully Depleted Ti–Nb–Ta–Zr–O Nanotubes: Interfacial Charge Dynamics and Solar Hydrogen Production. ACS Applied Materials & Interfaces 2018, 10 (27), 22997-23008).

So please clarify the above doubt with references if you have.

Thank you.

This is due to the different unit used in calculation.

Thank you Zhaojue Lan

Are IPCE and EQE the same? I underestand that EQE is the same but we calculate it with a device that gives us a reference and we can calculate through it the #photons. Am I wright?

Thanks in advanced,