Dear Mukesh

welcome again,

I would propose if you have AM1.5 incident solar radiation spectrum in units w/m^2 nm that you express the shortcircuit current equation in terms of lambda rather that the photon energy. This is ataright forward calculations:

-At first assume P(lambda) ia given

- Convert P(lambda) into photons /m^2 nm by simply dividing every value in the curve by hc/ lambda where lambda that corresponds to a specifci P.

That is the spectrum in photons/m^2/nm = Pph= P lambda/hc,

Then multiply by q and integrate with respect to lambda that is

Jsc= q integal P(Lambda) lambda dlambda from lambda=0 to lambda= Lambda cutoff

where Lambda cut off= hc/ Egoptical.

In this way you can get Jsc

Best wishes

Dear Mukesh

welcome again,

I would propose if you have AM1.5 incident solar radiation spectrum in units w/m^2 nm that you express the shortcircuit current equation in terms of lambda rather that the photon energy. This is ataright forward calculations:

-At first assume P(lambda) ia given

- Convert P(lambda) into photons /m^2 nm by simply dividing every value in the curve by hc/ lambda where lambda that corresponds to a specifci P.

That is the spectrum in photons/m^2/nm = Pph= P lambda/hc,

Then multiply by q and integrate with respect to lambda that is

Jsc= q integal P(Lambda) lambda dlambda from lambda=0 to lambda= Lambda cutoff

where Lambda cut off= hc/ Egoptical.

In this way you can get Jsc

Best wishes

See the procedure in the following book:

Da Rosa, A. V. (2012). Fundamentals of renewable energy processes. Academic Press.

Abdelhalim Zekry, sir: How to calculate the Power Conversion efficiency theoretically, bu using computation software (Gaussian, SIESTA,VASP...)