Semiconductor LED's have a slow response time and hence a low frequency operation and low band width because: a. their produced photons are mainly due to the diffusion process of the injected carriers b. Their produced photons are due to injected electrons having a low drift velocity only in n-side of the junction C. Their produced photons are due to injected holes having a low drift velocity only in p-side of the junction d. Their produced photons are due to injected electrons and holes having a low drift velocity due to low biasing voltage. e. Non of the given choices is correct.
Semiconductor LED's have a slow response time and hence a low frequency operation and low band width because: a. their produced photons are mainly due to the diffusion process of the injected carriers b. Their produced photons are due to injected electrons having a low drift velocity only in n-side of the junction C. Their produced photons are due to injected holes having a low drift velocity only in p-side of the junction d. Their produced photons are due to injected electrons and holes having a low drift velocity due to low biasing voltage. e. Non of the given choices is correct.
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Optoelectronics
Transcribed Image Text:Semiconductor LED's have a slow response
time and hence a low frequency operation and
low band width because:
a.
their produced photons are mainly
due to the diffusion process of
the injected carriers
b.
Their produced photons are due to
injected electrons having a low
drift velocity only in n-side of
the junction
C.
Their produced photons are due to
injected holes having a low drift
velocity only in p-side of the
junction
d.
Their produced photons are due to
injected electrons and holes
having a low drift velocity due
to low biasing voltage.
e.
Non of the given choices is
correct.
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