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For a junction diode the ratio of forward current \( \left(\mathrm{I}_{\mathrm{f}}\right) \) and reverse current \( \left(\mathrm{I}_{\mathrm{r}}\right) \) is
\( [\mathrm{e}= \) electronic charge,
\( \mathrm{V}= \) voltage applied across junction,
- \( \mathrm{k}= \) Boltzmann constant,
- \( \mathrm{T}= \) temperature in kelvin ]
(a) \( \mathrm{e}^{-\mathrm{V} / \mathrm{kT}} \)
(b) \( \mathrm{e}^{\mathrm{V} / \mathrm{kT}} \)
(c) \( \left(\mathrm{e}^{-\mathrm{eV} / \mathrm{kT}}+1\right) \)
(d) \( \left(e^{\mathrm{eV} / \mathrm{kT}}-1\right) \)
E
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