Question

A photodiode with a bandgap energy of \(1.43\ \text{eV}\) has a cut-off wavelength approximately equal to

• A. \(870\ \text{nm}\)
• B. \(1550\ \text{nm}\)
• C. \(650\ \text{nm}\)
• D. \(1310\ \text{nm}\)

Hint:

The cut-off wavelength of a semiconductor is \[ \boxed{ \lambda_c(\text{nm})=\frac{1240}{E_g(\text{eV})} } \]

Answer 1

The Correct Option is A