The Meyer–Neldel rule for dc activation processes in mixed isoelectronic chalcogens systems

Investigation of the Meyer–Neldel compensation rule in binary selenium-based amorphous semiconductors

“…As a concluding remark, combining the data of both groups (A and B) does not lead to a pronounced change in values of the two YM parameters (r and ℏω 0 ): −6.45 and 42.1 meV for GA, and −6.73 and 42.9 meV for GA with GB. On the other hand, these obtained values of r and ℏω 0 for both groups (A and B) of the binary Se-based systems (2D-3D) are different from those (−8.52 and 74.4 meV, [11]) recently obtained for non-crystalline Se-like structural (1D) semiconductors.…”

“…This range represents a wider range than that obtained for mixed isoelectronic chalcogens systems (10 −15 -10 −5 (Ω·cm) −1 , [11]) and, also, than that found for some ternary chalcogenide glasses (As-Se-S, As-Se-I, Se-S-Te, (10 −15 -10 −5 (Ω·cm) −1 ), [8]). On the other hand, the value of σ 00 lies in the range of 10 −6 -10 +3 (Ω·cm) −1 for hydrogenated amorphous silicon (a-Si:H), [37], and lies in the range of 10 −17 -10 −3 (Ω·cm) −1 for organic semiconductors [38,39].…”

“…The obtained bulk ingots were used as ground materials for preparing samples in thin film forms by the thermal evaporation technique. Principles of the preparation techniques as well as measurements of the temperature dependence of DC conductivity are given elsewhere [11,23]. The considered Se-Cu thin films were prepared by the chemical bath deposition, and found to be in polycrystalline phases [24].…”

“…Nevertheless, the common limitation for most of the above models was that they could not provide a universal explanation of the MNCR in all materials for a particular thermally activated process or vice versa. In a recent review [11], the MNCR has been examined for mixed isoelectronic chalcogens systems in which the addition of S and/or Te to Se leads to a formation of 1D material. This paper aims at presenting the evidence of MNCR for various amorphous binary selenium-based chalcogenide systems of the general formula Se-X, where X is a guest element from different groups of the periodic table (Cu, Ga, In, Tl, Ge, P, As, Sb and Bi).…”