Novel cubic ZnxMg1−xO epitaxial heterostructures on Si (100) substrates

Narayan, J.; Sharma, Ajay; Kvit, A.; Jin, Chunming; Muth, John F.; Holland, O. W.

doi:10.1016/s0038-1098(01)00431-8

Cited by 120 publications

(70 citation statements)

References 14 publications

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“…[5][6][7][8][9] One of the features of ZnO is its band gap potential tunability to a wide range from 3.37 to 6.7 eV via magnesium incorporation into ZnO lattice (Mg x Zn 12x O). 10 Films of Mg x Zn 12x O exist in two different phases with hexagonal and cubic structures depending on the Mg concentration. 10,11 Maintaining hexagonal structure the optical band gap of Mg x Zn 12x O could be enhanced up to 4.3 eV, 11 whereas the cubic phase takes the advantage of extending the band gap to a value very close to 6.7 eV.…”

Section: Introductionmentioning

confidence: 99%

“…10,11 Maintaining hexagonal structure the optical band gap of Mg x Zn 12x O could be enhanced up to 4.3 eV, 11 whereas the cubic phase takes the advantage of extending the band gap to a value very close to 6.7 eV. 10 The O spectra. The spectrophotometer covers the 200 to 800 nm spectral region by using a deuterium and a halogen lamp, and thus nominally allows the analysis of material with band gap energies up to y6-6.5 eV.…”

Section: Introductionmentioning

confidence: 99%

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Self-assembled MgxZn_1−xO quantum dots (0 ≤ x ≤ 1) on different substrates using spray pyrolysis methodology

Achary¹,

Agouram²,

Sánchez-Royo³

et al. 2013

CrystEngComm

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a By using the spray pyrolysis methodology in its classical configuration we have grown self-assembled Mg x Zn 12x O quantum dots (size y4-6 nm) in the overall range of compositions 0 ¡ x ¡ 1 on c-sapphire, Si (100) and quartz substrates. Composition of the quantum dots was determined by means of transmission electron microscopy-energy dispersive X-ray analysis (TEM-EDAX) and X-ray photoelectron spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Self-assembled MgxZn_1−xO quantum dots (0 ≤ x ≤ 1) on different substrates using spray pyrolysis methodology

Achary¹,

Agouram²,

Sánchez-Royo³

et al. 2013

CrystEngComm

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show abstract

“…The solubility depends strongly on experimental conditions and can be considerably increased at high temperatures and high pressures. 5,6 Non-equilibrium growth processes, like pulsed laser deposition (PLD) 7,8,9,10,11 and molecular beam epitaxial methods 12,13,14,15 , allow to grow highquality Mg x Zn 1−x O thin films for a large range of concentrations x. For RS-Mg x Zn 1−x O, produced by PLD, a maximum solubility has been reported for x = 0.5.…”

Section: Introductionmentioning

confidence: 99%

Structural phase transitions and fundamental band gaps ofMgxZn1−xOalloys from first principles

et al. 2009

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The structural phase transitions and the fundamental band gaps of MgxZn1−xO alloys are investigated by detailed first-principles calculations in the entire range of Mg concentrations x, applying a multiple-scattering theoretical approach (Korringa-Kohn-Rostoker method). Disordered alloys are treated within the coherent potential approximation (CPA). The calculations for various crystal phases have given rise to a phase diagram in good agreement with experiments and other theoretical approaches. The phase transition from the wurtzite to the rock-salt structure is predicted at the Mg concentration of x = 0.33, which is close to the experimental value of 0.33 − 0.40. The size of the fundamental band gap, typically underestimated by the local density approximation, is considerably improved by the self-interaction correction. The increase of the gap upon alloying ZnO with Mg corroborates experimental trends. Our findings are relevant for applications in optical, electrical, and in particular in magnetoelectric devices.

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“…It is interesting that MgO in the core-sheath structure has lower 2θ values than the standard diffraction peaks of MgO. We suppose that there exists a Zn x Mg 1-x O layer [12,13] between ZnO rods and MgO lamellas in the core-sheath rods, and it collapses with ZnO while washed with ammonia.…”

Section: Resultsmentioning

confidence: 95%

One‐step synthesis of ZnO/MgO core‐sheath structures

Wei

Chen

et al. 2009

Cryst. Res. Technol.

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A kind of ZnO/MgO core-sheath structure has been prepared directly by the pyrolysis of a mixture of polyvinyl alcohol, magnesium acetate, and zinc chloride coating on glass fiber mats at 450 °C for 60 min. The growing process and effect of the anions on the morphology of ZnO/MgO structures have been preliminarily discussed. The results indicate that ZnCl 2 will transform to ZnO crystal through an intermediate of zinc hydroxide chloride. ZnO crystal act as the core of the micorod, and MgO lamellas act as the sheath. The concurrence of chloride and acetate anions in the precursor is necessary for the growth of ZnO/MgO coresheath structures.

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Novel cubic ZnxMg1−xO epitaxial heterostructures on Si (100) substrates

Cited by 120 publications

References 14 publications

Self-assembled MgxZn_1−xO quantum dots (0 ≤ x ≤ 1) on different substrates using spray pyrolysis methodology

Self-assembled MgxZn_1−xO quantum dots (0 ≤ x ≤ 1) on different substrates using spray pyrolysis methodology

Structural phase transitions and fundamental band gaps ofMgxZn1−xOalloys from first principles

One‐step synthesis of ZnO/MgO core‐sheath structures

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Novel cubic ZnxMg1−xO epitaxial heterostructures on Si (100) substrates

Cited by 120 publications

References 14 publications

Self-assembled MgxZn1−xO quantum dots (0 ≤ x ≤ 1) on different substrates using spray pyrolysis methodology

Self-assembled MgxZn1−xO quantum dots (0 ≤ x ≤ 1) on different substrates using spray pyrolysis methodology

Structural phase transitions and fundamental band gaps ofMgxZn1−xOalloys from first principles

One‐step synthesis of ZnO/MgO core‐sheath structures

Contact Info

Product

Resources

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Self-assembled MgxZn_1−xO quantum dots (0 ≤ x ≤ 1) on different substrates using spray pyrolysis methodology

Self-assembled MgxZn_1−xO quantum dots (0 ≤ x ≤ 1) on different substrates using spray pyrolysis methodology