Modeling and characterization of carrier mobility for truncated conical quantum dot infrared photodetectors

J–V characteristics of dark current in truncated conical quantum dot infrared photodetectors (QDIPs)

“…In the above equations, the carrier mobility is not constant as it is highly impacted by the scattering events occurred due to the QDs, so it depends on both structure dimensions and the operating temperature [16], [17] .…”

“…In QDIPs, the QDs are considered as scatterers of the free carriers and consequently limiting their mobility which will affect the dark current. The impacts of the self assembled QDs on the electron mobility has been studied for various QD shapes, such as conical [16], truncated conical [17], and semispherical shapes [26].…”

“…This con nement increases the potential barrier that the free electrons face [18]. The mobility carriers of the truncated conical QDs dot has been evaluated based on the solution of Boltzmann transport equation [17]. Both the QD lling and the carrier mobility and in turns the dark current of the QDIP are critically dependent on the operating temperature, the volume of the QD, the QD density and the dimension of the QD, then these effects have been investigated in this work.…”