Quasi-ternary System Cu2Te-CdTe-In2Te3

Kadykalo, E. M.; Marushko, L. P.; Ivashchenko, I. A.; Zmiy, O. F.; Olekseyuk, I. D.

doi:10.1007/s11669-013-0228-z

Cited by 7 publications

(6 citation statements)

References 9 publications

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“…As discussed above in Section , bulk I–III–VI materials can exist in several crystal structures, depending on their composition as well as crystallization temperature (i.e., low and high temperature modifications). − In most cases, the crystal structure of I–III–VI NCs is the same as that for the bulk I–III–VI composition. This can be illustrated, for example, by the Ag–In–S system, for which stoichiometric AgInS 2 NCs crystallize in orthorhombic lattice, while In-rich Ag–In–S NCs have cubic spinel-type structure. ,, …”

Section: Synthesis Of I–iii–vi Nanocrystalsmentioning

confidence: 97%

“…However, in binary II–VI materials, the cationic site is occupied by the Group II metal, while the cationic site in the I–III–VI materials is a mixture of a Group I metal (i.e., Ag or Cu) and a Group III metal (i.e., Al, Ga, In, or Tl). The ratio between constituent Group I and Group III metals can be tuned over a wide region. − Taking the example of Cu–In–Se: when the Cu:In ratio is higher than 1, the material is referred to as “Cu-rich”, when the Cu:In ratio is lower than 1 it is “In-rich”, and when the Cu:In ratio is 1, the phase is “stoichiometric”.…”

Section: Properties Of Bulk I–iii–vi Materialsmentioning

confidence: 99%

“…Similarly to Cu–In–Se materials, other Cu–In–E and Ag–In–E systems (where E = S, Se, or Te) contain stoichiometric and In-rich I–III–VI phases with high-temperature modifications and broad solid solution range for many of them. − The existence of OVCs is observed for many In-rich I–III–VI materials. ,, The I–III–VI semiconductors exhibit interesting composition-dependent optical and electronic properties, stemming from structural peculiarities of these materials…”

Section: Properties Of Bulk I–iii–vi Materialsmentioning

confidence: 99%

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Tuning the Composition of Multicomponent Semiconductor Nanocrystals: The Case of I–III–VI Materials

2018

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Among the advantages of multicomponent nanocrystals is the possibility to adjust their electronic and optical properties with composition as well as size. However, the synthesis of multicomponent nanocrystals is challenging due to the presence of several metal precursors in the reaction mixture. This review takes I−III−VI semiconductor materials as an example class of multicomponent nanocrystals to highlight the underestimated importance of composition, which can affect the electronic and optical properties of nanocrystals as much as size. We discuss synthetic strategies, which enable the composition control, and show that the ability to separately choose nanocrystal size and nanocrystal composition can be beneficial for many optoelectronic and biomedical applications.

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Section: Synthesis Of I–iii–vi Nanocrystalsmentioning

confidence: 97%

Section: Properties Of Bulk I–iii–vi Materialsmentioning

confidence: 99%

Section: Properties Of Bulk I–iii–vi Materialsmentioning

confidence: 99%

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Tuning the Composition of Multicomponent Semiconductor Nanocrystals: The Case of I–III–VI Materials

2018

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“…Recently, superionic Cu 2– x X (X = S, Se) are reported to have ultralow κ and high zT due to the liquid-like behavior of Cu ions around the crystalline sublattice of X and are considered as a new class of phonon–liquid–electron–crystals (PLEC). − ,,− ,,, Further, the superionic CT2 has an interesting structure where the tellurium atom forms a rigid sublattice and the liquid-like Cu ions are distributed randomly in the rigid sublattice and thus classified as PLEC . It has been observed that several state of the art TE materials are tellurides, such as PbTe, SnTe, ,, and Bi 2 Te 3 , , and have better performances than their Se and S counterparts. ,, Thus, the present work focuses on the Raman spectroscopic studies of copper tellurides.…”

Section: Introductionmentioning

confidence: 99%

Raman Spectroscopy Study of Phonon Liquid Electron Crystal in Copper Deficient Superionic Thermoelectric Cu_2–xTe

Pandey

Mukherjee

Rawat

et al. 2020

ACS Appl. Energy Mater.

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Superionic Cu 2-x Te (CT) is an interesting and emerging p-type thermoelectric (TE) material due to the existence of various polymorphic phases and crystal structures, which undergo several structural phase transitions. On the basis of the stoichiometry of the CT compounds, the structure parameters, the carrier concentration (n p ), and the thermal conductivity (κ) can be modulated for optimum TE performance. Further, the understanding of the fundamental properties and their impact on TE parameters is not well understood because of their complex structures. We have investigated the vibrational properties of CT compounds such as Cu 1.25 Te (CT1.25), Cu 1.6 Te (CT1.6), and Cu 2 Te (CT2) using temperature dependent Raman studies in the temperature range of 300−773 K. Several structural phases are probed through remarkably distinct spectra for the CT compounds. The temperature transitions are complex such as (i) eutectic melting into CuTe and Te for both CT1.6 (above ∼593 K) and CT1.25 (above ∼613 K) and (ii) the structural transition from trigonal to orthorhombic and cubic phase for CT2 (above ∼553 K), which are strongly manifested in the Raman study. Further, the role of n p in the Raman spectra has also been investigated. The intensity of the Raman modes (>100 cm −1 ) showed strong n p dependence due to strong plasmon−phonon coupling. The analysis of full width at half-maximum (fwhm) of Raman peaks and qualitative estimation of phonon lifetime (τ i ) showed that CT2 has the minimum lattice thermal conductivity.

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“…Comparing reaction constants K (Fig. 3 16 this phase transformation can be attributed to the edge of chalcopyrite-type CuInTe 2 solid solution at about 0.65-0.67 Cu : In atomic ratio. Wurtzite-type structure have been previously reported for other I-III-VI NCs, 12a,17 however not observed in the bulk phase diagrams.…”

mentioning

confidence: 89%

Cu–In–Te and Ag–In–Te colloidal nanocrystals with tunable composition and size

Yarema

Lin

et al. 2016

Chem. Commun.

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We synthesize stable colloids of Cu-In-Te and Ag-In-Te nanocrystals using an amide-promoted technique, which enables independent size and composition control, and report the dependence of structural and optical properties on composition and size. Comparison to the synthesis of other ternary I-III-VI nanocrystals gives insight into the reaction mechanism and the generalizability of the amide-promote approach.

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Quasi-ternary System Cu2Te-CdTe-In2Te3

Cited by 7 publications

References 9 publications

Tuning the Composition of Multicomponent Semiconductor Nanocrystals: The Case of I–III–VI Materials

Tuning the Composition of Multicomponent Semiconductor Nanocrystals: The Case of I–III–VI Materials

Raman Spectroscopy Study of Phonon Liquid Electron Crystal in Copper Deficient Superionic Thermoelectric Cu_2–xTe

Cu–In–Te and Ag–In–Te colloidal nanocrystals with tunable composition and size

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Quasi-ternary System Cu2Te-CdTe-In2Te3

Cited by 7 publications

References 9 publications

Tuning the Composition of Multicomponent Semiconductor Nanocrystals: The Case of I–III–VI Materials

Tuning the Composition of Multicomponent Semiconductor Nanocrystals: The Case of I–III–VI Materials

Raman Spectroscopy Study of Phonon Liquid Electron Crystal in Copper Deficient Superionic Thermoelectric Cu2–xTe

Cu–In–Te and Ag–In–Te colloidal nanocrystals with tunable composition and size

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Product

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Raman Spectroscopy Study of Phonon Liquid Electron Crystal in Copper Deficient Superionic Thermoelectric Cu_2–xTe