Investigation of SnSe, SnSe2, and Sn2Se3 alloys for phase change memory applications

Chung, Kil-Saeng; Wamwangi, Daniel; Woda, Michael; Wuttig, Matthias; Bensch, Wolfgang

doi:10.1063/1.2894903

Cited by 164 publications

(110 citation statements)

References 31 publications

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“…362 Lead selenide (PbSe) and tin selenide (SnSe) are semiconductors of the IV-VI group, having a wide range of applications including optical switching, optical computing, telecommunication components, photovoltaics, thermoelectrics, photodetectors, infrared detectors, mid-infrared lasers, solar or photoelectrical cells, chemical sensors, and holographic recording systems. 363,364 Bismuth selenide (BiSe) belongs to the V-VI binary semiconductor group and is interesting because of its optical, electrical and thermoelectric properties. 365,366 The X-ray diffraction patterns of the mechanochemically synthesized AB-type semiconductors with corresponding time of mechanochemical synthesis are shown in Fig.…”

Section: Selenidesmentioning

confidence: 99%

Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

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The aim of this review article on recent developments of mechanochemistry (nowadays established as a part of chemistry) is to provide a comprehensive overview of advances achieved in the field of atomistic processes, phase transformations, simple and multicomponent nanosystems and peculiarities of mechanochemical reactions. Industrial aspects with successful penetration into fields like materials engineering, heterogeneous catalysis and extractive metallurgy are also reviewed. The hallmarks of mechanochemistry include influencing reactivity of solids by the presence of solid-state defects, interphases and relaxation phenomena, enabling processes to take place under non-equilibrium conditions, creating a well-crystallized core of nanoparticles with disordered near-surface shell regions and performing simple dry time-convenient one-step syntheses. Underlying these hallmarks are technological consequences like preparing new nanomaterials with the desired properties or producing these materials in a reproducible way with high yield and under simple and easy operating conditions. The last but not least hallmark is enabling work under environmentally friendly and essentially waste-free conditions (822 references).

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Section: Selenidesmentioning

confidence: 99%

Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

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“…Tin Selenide (SnSe) is a narrow band gap, binary IV-VI semiconductor, suitable for various optoelectronic applications like memory switching devices, photovoltaic, light emitting devices (LED), and holographic recording systems [1][2][3]. Large availability of constituents of SnSe compound in nature has been raised attention for the cost effective solution in photovoltaic applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of Film Thickness on Optical Properties of Tin Selenide Thin Films Prepared by Thermal Evaporation for Photovoltaic Applications

Kumar¹,

Parihar²,

Kumar³

et al. 2012

MATERIALS

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Tin Selenide (SnSe) thin films were prepared from the pulverized compound material by thermal evaporation method, to study the effect of film thickness on its structural, and optical properties. The different thicknesses of SnSe thin films, from 150 nm to 500 nm, were grown on glass substrate held at room temperature. X-ray diffraction, atomic force microscopy, transmission measurement, and four-point probe method were used to characterize the thin films. The optical transmission spectra suggests, the energy band gap decreases with increasing the film thickness. The electrical resistivity shows that the films were semi-conducting in behavior having p-type conductivity.

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“…Thin films of metal chalcogenides have attracted considerable attention due to theirs application prospects, in infrared optoelectronic devices, radiation detectors, memory devices and holographic recording systems [1][2][3][4][5][6] . In particular, binary compounds such as tin monoselenide, SnSe, and tin diselenide, SnSe 2 , are seen by the community as potential candidates for photovoltaic applications 7 .…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic pathway for the formation of SnSe and SnSe2 polycrystalline thin films by selenization of metal precursors

et al. 2013

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In this work, tin selenide thin films (SnSe x ) were grown on soda lime glass substrates by selenization of dc magnetron sputtered Sn metallic precursors. Selenization was performed at maximum temperatures in the range of 300 • C to 570 • C. The thickness and the composition of the films were analysed using step profilometry and energy dispersive spectroscopy, respectively. The films were structurally and optically investigated by X-Ray diffraction, Raman spectroscopy and optical transmittance and reflectance measurements. X-Ray diffraction patterns suggest that for temperatures between 300 • C and 470 • C the films are composed of hexagonal-SnSe 2 phase. By increasing the temperature, the films selenized at maximum temperatures of 530 • C and 570 • C show orthorhombic-SnSe as the dominant phase with a preferential crystal orientation along the (400) crystallographic plane. Raman scattering analysis allowed the assignment of peaks at 119 cm −1 and 185 cm −1 to the hexagonal-SnSe 2 and 108 cm −1 , 130 cm −1 and 150 cm −1 to the orthorhombic-SnSe phase. All samples present traces of condensed amorphous Se with a characteristic Raman peak located at 255 cm −1 . From optical measurements, the estimated band gap energies for hexagonal-SnSe 2 were close to 0.9 eV and 1.7 eV for indirect forbidden and direct transitions, respectively. The samples with the dominant orthorhombicSnSe phase presented estimated band gap energies of 0.95 eV and 1.15 eV for indirect allowed and direct allowed transitions, respectively.

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Investigation of SnSe, SnSe2, and Sn2Se3 alloys for phase change memory applications

Cited by 164 publications

References 31 publications

Hallmarks of mechanochemistry: from nanoparticles to technology

Hallmarks of mechanochemistry: from nanoparticles to technology

Effect of Film Thickness on Optical Properties of Tin Selenide Thin Films Prepared by Thermal Evaporation for Photovoltaic Applications

Thermodynamic pathway for the formation of SnSe and SnSe2 polycrystalline thin films by selenization of metal precursors

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