Semiconductor LED's have a slow response time and hence a low frequency operation and low band width because: а. 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 С. 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.

Semiconductor LED's have a slow response time and hence a low frequency operation and low band width because: а. 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 С. 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.