Calculation of a hierarchical PbS-C superlattice in a multiwell model

Glushko, E. Ya.; Evteev, V. N.

doi:10.1134/1.1187035

Cited by 5 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lead telluride belongs to the group A IV B VI semiconductors which crystallize in the FCC NaCl-type structure at ambient conditions. The unusual characteristics of lead salts, such as narrow band gap E 0 ∼ 0.3 eV whose temperature coefficient is positive, the high dielectric constant, and the large carrier mobility, make them unique among polar semiconductors and have important applications in many fields, such as infrared detectors, light-emitting devices, more recently as infrared laser in fiber optics, thermoelectric materials, solar energy panel, and window coatings [1][2][3][4][5][6][7][8]. Recently, other specific low-dimensional structures such as multiple quantum-well systems, super lattices, and quantum dots have attracted much attention in various fields such as infrared sensor arrays, vertical cavity surface emitting laser, thermoelectricity, self-organized semiconductor nanostructures, and persistent low-temperature photoconductivity [9].…”

Section: Introductionmentioning

confidence: 99%

Structural, Electrical, and Optical Properties of PbTe Thin Films Prepared by Simple Flash Evaporation Method

Kungumadevi¹,

Ramakrishnan²

2012

Advances in Condensed Matter Physics

View full text Add to dashboard Cite

Lead telluride (PbTe) films have been prepared on glass substrates by flash evaporation method. Structure of the film is found to possess stable face-centered cubic (fcc) NaCl phase in which the grains predominantly grow in the direction of (200) plane. The calculated grain size was in the range 19 nm. The electrical resistivity as a function of temperature was measured using four-probe technique. The electrical conductivity was calculated, and the value is found to be from 67.11 to 344.82 S/cm in the temperature range 303-453 K. The value of mobility was evaluated, and it is found to be 0.329 × 10 −3 cm 2 · V −1 S −1 . An optical study reveals that the PbTe thin films exhibit large blue shift. The optical constants such as absorption coefficient and refractive index have been estimated, and the results are discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Structural, Electrical, and Optical Properties of PbTe Thin Films Prepared by Simple Flash Evaporation Method

Kungumadevi¹,

Ramakrishnan²

2012

Advances in Condensed Matter Physics

View full text Add to dashboard Cite

show abstract

“…Lead chalcogenides have been motivated by their use as sensors for infrared radiation, photoresistors, lasers, solar cells, optoelectronic devices and thermoelectric devices [1][2][3][4][5][6][7][8][9]. Generally, IV-VI crystals are characterized by a very high concentration of vacancies.…”

Section: Introductionmentioning

confidence: 99%

Studies on sintering effect on the transport properties ofPb_1−xSm_xSe

Ibrahim¹,

Saleh²,

Ibrahim³

et al. 2007

Phys. Scr.

View full text Add to dashboard Cite

Pb 1−x Sm x Se (x = 0.03, 0.06 and 0.09) compounds are synthesized by solid-state reaction. The x-ray diffraction technique, scanning electron microscope, electrical and thermoelectric power measurements were used to characterize the prepared samples. The samples are sintered at 488 K and the effect of the sintering time on the transport properties was investigated. The metal-insulator transition occurrence depends on both the Sm content and the sintering time. The energy band gap E g was calculated for the sintered samples of 0.06 Sm composition in the intrinsic region. The Seebeck coefficient measurements show that all the samples under investigation are n-type semiconductor materials with electron carrier predomination at low temperature and hole conduction contribution at high temperature. The power factor S 2 σ was calculated and gave a good indication of the wide application of the investigated compositions as thermoelectric materials.

show abstract