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iamlooting_yo
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Homework Statement
Ideality factor and reverse saturation current
http://3.bp.blogspot.com/_h90yJnbZXIE/SfMcs8FCF8I/AAAAAAAAAFk/dJ7cnqLGntk/s1600-h/circuit_fordiodeparameterextraction.JPG
Use the circuit above to determine the I-V characteristic over 3 decades of current from 0.01 mA to 10 mA. Record the current and voltage values using the two DMMs and plot the I versus V date on a semilog graph paper.
Explain how you can determine the slope of the ln I versus V relationship from the semilog plot. From this graph, determine the ideality factor n and reverse saturation current I0.
I0 = 0.3nA (y-intercept of the graph from the semilog plot)
Gradient of ln I against V graph: q/nKT=ln〖(9×〖10〗^3 )-ln50 〗/(0.4-0.2)=25.96=26.0
Ideality factor, n=q/(26.0)KT=1/(26.0×0.0252)=1.53
Homework Equations
This is where I stuck:
Suggest an extension to this experiment by which the coefficient A of a diode in equation 6 can be determined
I0 =AT^3 e^((-Eg)/kT) (6)
PLease help!
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