Transport of Information-Carriers in Semiconductors and Nanodevices

Light-Induced Thermal and Optical Behavior of Functionalized Side-Chain Push–Pull Azo Polymer Thin Films

“…The usually reported κ values are just within 0.1–0.6 W m –1 K –1 for non-conducting polymer thin films. − Even though much higher κ values are possible to achieve at the nanoscale, they are observed only for single-polymer chains, i.e., for polymers in the form of nanotubes or nanowires. − For the 3D structures, especially for branched polymers, which are our azo polymer samples, κ values are usually below 1 W m –1 K –1 . − This can be explained as follows. The heat transport in the non-conducting materials can be described in terms of phonons created by lattice vibrations that propagate through them. , It is known that polymers are not crystalline structure materials and do not have a long-range order. However, if there is at least a short-range order, the description of the heat transport via the phonons is still valid. , The phonon mean free path ( L ) is significantly reduced in polymers compared to pure crystalline materials, , but still (in some single-polymer chains), an efficient path for phonon transport with weak scattering can be achieved .…”

“…The heat transport in the non-conducting materials can be described in terms of phonons created by lattice vibrations that propagate through them. 59,60 It is known that polymers are not crystalline structure materials and do not have a long-range order. However, if there is at least a shortrange order, the description of the heat transport via the phonons is still valid.…”

Recent Advancement on the Excitonic and Biexcitonic Properties of Low-Dimensional Semiconductors

“…Zero-dimensional semiconductor structures have captivated a notable interest owing to the fact that the motion is confined in all three directions, the size of a QDs being smaller than or comparable to the bulk exciton Bohr radius [109][110][111][112]. In this part of the chapter, some recent progresses in the topic which deals with the excitonic and biexcitonic effects for QDs applications case are emphasized, including computing and communication field, light-emitting devices, solar cells area, and biological domain [113,114].…”

Investigation of Electrical Latchup and SEL Mechanisms at Low Temperature for Applications down to 50K

“…This region of operation is known as the extrinsic regime. The incomplete ionization model at freeze-out regime is taken into account in highly-doped regions (> 10 17 cm -3 ) [9] [13]. In other regions, incomplete ionization is taken into account in the low-field component of carrier drift mobility [13] [14].…”