Curve Fitting of a nonlinear equation

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Jianchuan Tan 2013-6-24

编辑： Alex Sha 2021-9-11

Hi All,

I want to do a curve fitting for an LED I-V characteristics based on an LED model:

I - (V - I*Rs)/Rp = Is* (exp(q*(V-I*Rs)/(n*k*T))-1)

I have a series of corresponding V and I values:

V = [2.65462
80218
88911
94203
97592
00377
02513
04314
06204
08061
09944
]

and

Assume T is known, say, T=350

I need to get the values of Rs, Rp, Is and n. I am a beginer of Matlab. Please do me a favor to show me how. Thank you so much.

Alex Sha 2021-9-11

编辑：Alex Sha 2021-9-11

What are the values of q and k?

adriane duarte 2021-9-10

did you find this curve?

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