Study of trapping in Sb_xSe_1-xamorphous semiconductors

Abstract

Weinvestigated the effect ofthe addition of Sb atoms on the propenies of defect states of pure amorphous selenium. The trap levels have been studied by a combination of conventional thermally stimulated depolarization current spectroscopy and time-of-flight measurements. Taken together, these experiments show that Sb introduces a new Set of shallow uaps for electrons at energies 0 2 2 , 0 3 4 and 0.45 eV below the conduction band edge, in addition to that existing in pure selenium. At the same time, progressive addition of antimony markedly enhances the deep trapping of holes.

Effect of Sb impurity on the photoelectrical properties of a-Se

“…The thermal stability, carrier drift mobilities and optical properties in thin films of Se-Sb alloys have been investigated by various authors [13,14]. Study of trapping in Se 100−x Sb x chalcogenide glasses has been done by Mikla et al [15]. Recently the dielectric studies, high field effects, crystallization kinetics have been reported by our research group [16][17][18] also.…”

Structural characterization of light-induced crystal growth in Se98Sb2 chalcogenide glass

“…Laser-induced crystal growth in amorphous films of Sb 2 M 3 (C= S, Se, Te), has been reported by Arun et al [12]. Study of trapping in Sb x Se 1 − x amorphous semiconductors has been done by Mikla et al [13]. Calorimetric studies on Se-Sb thin films have also been reported in literature [14,15].…”

“…Recently, considerable attention has been focused on glasses of Se-Sb system [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] as these materials have found applications for their electrical, optical, dielectric and thermal properties. Glasses of Se-Sb system exhibit switching effect [1,2].…”

Thermally Stimulated Depolarization Currents in Amorphous Chalcogenides

“…Although TSC exceeds the dark conductivity, the absence of a well-defined structure of the TSC does not allow identification of the respective trapping levels [17][18][19]. Therefore, other methods of thermal activation spectroscopy are needed, e.g., TSDCs.…”

“…Note that some of the traps in the materials studied were "visible" in TOF and xerographic experiments [5,17,19]. Note that some of the traps in the materials studied were "visible" in TOF and xerographic experiments [5,17,19].…”