Optical and electrical properties of ternary chalcogenides

Synthesis of fibrous reticulate nanocrystalline n-type MoBi2(Se1−xTex)5 thin films: Thermocooling applications

“…7 illustrates the variation of Seeback coefficient (S) with temperature. The polarity of thermo emf shows positive towards hot end with respect to cold end, which confirms that MoBi 2 (Se 1Àx Te x ) 5 thin films are of n-type [26,27]. As well as the negative sign of Seeback coefficient indicates the n-type conduction mechanism.…”

Phase diagram of the CdGa2Se4−Bi2Se3 system and growth of CdGa2Se4 single crystals

“…However, its application is somewhat limited by the complex technology of production of high-quality bulk crystals. Small CdGa 2 Se 4 crystals were mainly grown using chemical vapor transport (CVT) reactions, where iodine acted as a transport agent [5][6][7][8][9]. There are also two works on the CdGa 2 Se 4 crystal growth by solution-melt methods [10,11].…”

The fundamental absorption edge in MnIn2Se4 layer semi-magnetic semiconductor

“…For these reasons, it is suggested that this line is probably related to an internal optical transition between an excited state to the 6 A 1 ground state of Mn +2 ions. Se OVC's have an indirect absorption edge immediately followed by a direct band gap [12,[39][40][41][42][43][44][45][46]. This is shown in Table II from optical data which vary from 17 to 25 meV.…”

“…These OVC's exist in different crystal structures and display semiconducting properties, show a broad range of band gaps, form mutual solid solutions and manifest several interesting optical and structural properties associated with the crystallographic ordered array of vacancies [3][4][5]. Among these materials the semi-magnetic semiconductors Mn III 2 B VI 4 C have also received considerable attention [12][13][14][15][16][17][18][19][20][21][22][23]. This is mainly because of the presence of magnetic Mn +2 ions which make these compounds of considerable interest from the point of view of their magneto-optical properties.…”