i'd just started my 1st year in E&E and i got a question like this in my basic electronic class:
the photodetector is used to detect infrared of wavelength 1μm upwards. what type fo semiconductor material must be used to design the detector?

Question

i'd just started my 1st year in E&E and i got a question like this in my basic electronic class:
the photodetector is used to detect infrared of wavelength 1μm upwards. what type fo semiconductor material must be used to design the detector?

anonymous · Answer

somehow i think we need to use E=hv? and f=vλ?

anonymous · Answer

For wavelengths 1-2.5 um the material is PbS, Lead(II) Sulfide

anonymous · Answer

how do your reach to that conclusion? we need to refer to any data sheet?

anonymous · Answer

check photodetectors and range of utilization for infrared