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LED (PN junctions): if you have a graph of V (x-axis) vs ln(I) (y-axis), how do...

LED (PN junctions): if you have a graph of V (x-axis) vs ln(I) (y-axis), how do you calculate Vt (thermal voltage) and Is (saturation current)?
While plotting the graph, do you take ln of the current in amps or mA?

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Answer #2

The Shockley equation describe the characteristic of LED.

I have attached a hand written description of your question along with the the characteristic graph for LED

The graph V against ln(I) will be a straight line passing through origin as you can see from the adjacent graph.

The quantity ln(I) would be a unitless quantity.

answered by: anonymous
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