Effects of Temperature, Pressure, and Metal Promoter on the Recrystallized Structure and Optical Transmission of Chemical Vapor Deposited Zinc Sulfide

McCloy, John S.; Korenstein, R.; Zelinski, Brian J.J.

doi:10.1111/j.1551-2916.2009.03123.x

Cited by 59 publications

(27 citation statements)

References 45 publications

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“…In fact, traditional II-VI three-dimension (3D) compounds have important applications in electronics and optoelectronics. For example, ZnO has the potential in blue-light devices [25], and ZnS is an important candidate for transmitting windows in infrared region [26]. In this work, thirty-two 2D honeycomb structures of IIA (or IIB)-VIA compounds are studied by first-principles calculations.…”

Section: Introductionmentioning

confidence: 99%

Monolayer II-VI semiconductors: A first-principles prediction

et al. 2015

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A systematic study of thirty-two honeycomb monolayer II-VI semiconductors is carried out by first-principles methods. While none of the two-dimensional (2D) structures can be energetic stable, it appears that BeO, MgO, CaO, ZnO, CdO, CaS, SrS, SrSe BaTe and HgTe honeycomb monolayer have a good dynamic stability, the stability of the five oxides is consistent with the work published in [H. L. Zhuang et al., Appl. Phys. Lett. 103, 212102 (2013)]. The rest of the compounds in the form of honeycomb are dynamically unstable, revealed by phonon calculations. In addition, according to the molecular dynamic (MD) simulation evolution from these unstable candidates, we also find two extra monolayers dynamically stable, which are tetragonal BaS [P4/nmm (129)] and orthorhombic HgS [P2 1 /m (11)]. The honeycomb monolayers exist in the form of either a planar perfect honeycomb or a low-buckled 2D layer, all of which possess a band gap and most of them are in the ultraviolet region.Interestingly, the dynamically stable SrSe has a gap near visible light, and displays exotic electronic properties with a flat top of the valence band, and hence has a strong spin polarization upon hole doping. The honeycomb HgTe has recently been reported to achieve a topological nontrivial phase under appropriate in-plane tensile strain and spin orbital coupling (SOC) [J. Li et al., arXiv:1412.2528v1 (2014]. Some II-VI partners with less than 5% lattice mismatch may be used to 2 design novel 2D heterojunction devices. If synthesized, potential applications of these 2D II-VI families could include optoelectronics, spintronics and strong correlated electronics.Corresponding

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Section: Introductionmentioning

confidence: 99%

Monolayer II-VI semiconductors: A first-principles prediction

et al. 2015

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“…First, the GeS 2 was shown to be a mix of GeS (orthorhombic Pnma) and GeS 2 (monoclinic P2 1 /c or P12 1 /c1 [47]), therefore the precise Ge/S ratio from this raw material is questionable. The ZnS sample refinement indicated~10% hexagonal ZnS, which is typical for CVD ZnS [2]. The Ga 2 S 3 , CaS, and CdS, were phase-pure.…”

Section: Raw Materials Analysismentioning

confidence: 98%

“…The rationale was to target crystalline phases such as La 3.33 Ga 6 S 14 that also has an oxygen-containing variant La 3.33 Ga 6 S 12 O 2 for (1), CaLa 2 S 4 [50] for (2), and ZnGa 2 S 4 [51] for (3).…”

Section: Ga 2 S 3 -La 2 S 3 Systemmentioning

confidence: 99%

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Infrared-transparent glass ceramics: An exploratory study

McCloy

Riley

Pierce

2015

Journal of Non-Crystalline Solids

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a b s t r a c tIn this work, the vision and need for a fully ceramized long-wave infrared (LWIR)-transmitting glass ceramic have been articulated. Three sulfide systems were explored including two with La 2 S 3 in hopes of imparting strong bonds from this refractory sulfide, and two containing GeS 2 in hopes of widening the glass-forming region. Attempts were made to produce glasses in the Ga 2 S 3 -La 2 S 3 -(ZnS,CaS) system, the GeS 2 -La 2 S 3 system, and the GeS 2 -Ga 2 S 3 -CdS system. Water quenching produced glasses of Ga 2 S 3 -La 2 S 3 -CaS and GeS 2 -Ga 2 S 3 -CdS. Microstructural and thermal analyses were used to explore nucleation and growth in these systems and infrared transmission and mechanical hardness showed potential for LWIR window use. The GeS 2 -Ga 2 S 3 -CdS system showed good LWIR transmission and pre-crystallized hardness superior to chemical vapor deposited ZnS. The Ga 2 S 3 -La 2 S 3 glasses did not appear to be viable candidates at this time due to a small temperature window between crystallization and glass transition temperatures and problems with oxygen contamination in the La 2 S 3 source. Suggestions are made for two alternative methods for producing fully ceramized LWIR-transmitting glass ceramics.

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“…As the growth process of CVDZnS is complex, the mechanisms for the chemical reaction and the formation of microstructures and defects remain unclear [3,[5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Defects in CVDZnS

Lü

Wang

et al. 2011

Rare Metals

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Defects seriously influence the optical properties and mechanical properties of CVDZnS. The deposition technique was introduced and experiment methods such as SEM, TEM and OM were adopted to study the defects: hexagonal phase, abnormally large grains, micro-cracks, micro-pores and impurities. The microstructures of these defects were observed, and the formation mechanisms of these defects were analyzed. Hexagonal ZnS as an impurity causes anisotropy in different directions with different refraction indexes and increases the scattering of CVDZnS. Increasing the deposition temperature can inhibit the formation of the hexagonal phase. The main reason for the growth of abnormally large grains in CVDZnS is high deposition rate. The lower deposition temperature increases growth stress in CVDZnS, which consequently results in the bowing of CVDZnS plates, and introduces microscopic defects such as grain blending and micro-cracks in the crystal. Micro-pores and impurities are induced by high reactant concentration in the local deposition chamber, which can be avoided by improving the gas flowing so as to make the concentration more uniform.

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Effects of Temperature, Pressure, and Metal Promoter on the Recrystallized Structure and Optical Transmission of Chemical Vapor Deposited Zinc Sulfide

Cited by 59 publications

References 45 publications

Monolayer II-VI semiconductors: A first-principles prediction

Monolayer II-VI semiconductors: A first-principles prediction

Infrared-transparent glass ceramics: An exploratory study

Defects in CVDZnS

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