Structural and optical properties of CuSe2 nanocrystals formed in thin solid Cu–Se film

Gilic, Martina; Petrović, Marko D.; Kostić, R.; Stojanović, D.; Barudžija, Tanja; Mitrić, Miodrag; Romčević, N.; Ralević, Uroš; Trajić, J.; Romčević, M.; Yahia, I.S.

doi:10.1016/j.infrared.2016.03.008

Cited by 26 publications

(12 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, unlike CuS, CuSe has a hexagonal superstructure and also undergoes phase transitions from the α-phase (room temperature, hexagonal unit cell), to the β-phase (327 K, orthorhombic unit cell) and the γ-phase (410 K, hexagonal unit cell). ,− Copper diselenide (CuSe 2 ) occurs in two different modifications, which are dependent on both temperature and pressure; marcasite is the low-temperature, low-pressure form, and pyrite is the high-temperature, high-pressure form . In both CuSe 2 structures, each Cu atom is coordinated to six Se atoms in a distorted octahedral arrangement and each Se atom is bonded to three Cu neighbors and one Se neighbor in a distorted tetrahedral configuration. ,, The difference between the structures is related to the Se octahedra, where they are connected by shared corners in pyrite and by shared edges to form chains in the marcasite structure.…”

Section: Crystal Phases and Stoichiometriesmentioning

confidence: 99%

Compound Copper Chalcogenide Nanocrystals

et al. 2017

View full text Add to dashboard Cite

This review captures the synthesis, assembly, properties, and applications of copper chalcogenide NCs, which have achieved significant research interest in the last decade due to their compositional and structural versatility. The outstanding functional properties of these materials stems from the relationship between their band structure and defect concentration, including charge carrier concentration and electronic conductivity character, which consequently affects their optoelectronic, optical, and plasmonic properties. This, combined with several metastable crystal phases and stoichiometries and the low energy of formation of defects, makes the reproducible synthesis of these materials, with tunable parameters, remarkable. Further to this, the review captures the progress of the hierarchical assembly of these NCs, which bridges the link between their discrete and collective properties. Their ubiquitous application set has cross-cut energy conversion (photovoltaics, photocatalysis, thermoelectrics), energy storage (lithium-ion batteries, hydrogen generation), emissive materials (plasmonics, LEDs, biolabelling), sensors (electrochemical, biochemical), biomedical devices (magnetic resonance imaging, X-ray computer tomography), and medical therapies (photochemothermal therapies, immunotherapy, radiotherapy, and drug delivery). The confluence of advances in the synthesis, assembly, and application of these NCs in the past decade has the potential to significantly impact society, both economically and environmentally.

show abstract

Section: Crystal Phases and Stoichiometriesmentioning

confidence: 99%

Compound Copper Chalcogenide Nanocrystals

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Only a few studies have reported on the fabrication and characterization of CuSbSe 2 thin films using the cosputtering method with Cu 2 Se/Sb 2 Se 3 and Cu/Sb 2 Se 3 target combinations [9,21,22]. The focus of this study was on the phases and the evolution of orientation of CuSbSe 2 thin films deposited using a radio frequency (RF) magnetron cosputtering system directly with CuSe 2 and Sb targets, while CuSe 2 generally has a cubic and orthorhombic structure that incongruently melts at 347 • C, forming CuSe and a Se-rich liquid [23]. A series of CuSb x Se 2 thin films were prepared with various levels of Sb content at the same thickness, adjusted by sputtering power for Sb and deposition time.…”

Section: Introductionmentioning

confidence: 99%

Impurity Phases and Optoelectronic Properties of CuSbSe2 Thin Films Prepared by Cosputtering Process for Absorber Layer in Solar Cells

Kim

2020

Coatings

View full text Add to dashboard Cite

When there is a choice of materials for an application, particular emphasis should be given to the development of those that are low-cost, nontoxic, and Earth-abundant. Chalcostibite CuSbSe2 has gained attention as a potential absorber material for thin-film solar cells, since it exhibits a high absorption coefficient. In this study, CuSbSe2 thin films were deposited by radio frequency magnetron cosputtering with CuSe2 and Sb targets. A series of CuSbxSe2 thin films were prepared with different Sb contents adjusted by sputtering power, followed by rapid thermal annealing. Impurity phases and surface morphology of Cu–Sb–Se systems were directly affected by the Sb sputtering power, with the formation of volatile components. The crystallinity of the CuSbSe2 thin films was also enhanced in the near-stoichiometric system at an Sb sputtering power of 15 W, and considerable degradation in crystallinity occurred with a slight increase over 19 W. Resistivity, carrier mobility, and carrier concentration of the near-stoichiometric thin film were 14.4 Ω-cm, 3.27 cm2/V∙s, and 1.33 × 1017 cm−3, respectively. The optical band gap and absorption coefficient under the same conditions were 1.7 eV and 1.75 × 105 cm−1, which are acceptable for highly efficient thin-film solar cells.

show abstract

“…The procedure was done in a high-vacuum environment with typical background pressures of 3 mPa. The deposition rate, 10 nm/s, was monitored by quartz crystal thickness monitor -FTM4, Edwards and the final films thicknesses was found to be 56 nm, 79 nm and 172 nm for the films labelled as F-55, F-80 and F-170, respectively [20].…”

Section: Methodsmentioning

confidence: 99%

“…In our previous report [20], we prepared Cu-Se thin films of three different thicknesses by vacuum evaporation technique using Mo boat onto glass substrate at room temperature, and investigated their structural properties. XRD and far-infrared spectroscopy revealed the presence of CuSe 2 nanocrystals in predominant Se films.…”

Section: Introductionmentioning

confidence: 99%

Low-temperature photoluminescence of CuSe2 nano-objects in selenium thin films

Gilic

Petrović

Ćirković

et al. 2017

PAC

View full text Add to dashboard Cite

Thin films of CuSe 2 nanoparticles embedded in selenium matrix were prepared by vacuum evaporation method on a glass substrate at room temperature. The optical properties of the films were investigated by photoluminescence spectroscopy (T = 20-300 K) and UV-VIS spectroscopy (T = 300 K). Surface morphology was investigated by scanning electron microscopy. The band gap for direct transition in CuSe 2 was found to be in the range of 2.72-2.75 eV and that for indirect transition is in the range of 1.71-1.75 eV determined by UV-VIS spectroscopy. On the other hand, selenium exhibits direct band gap in the range of 2.33-2.36 eV. All estimated band gaps slightly decrease with the increase of the film thickness. Photoluminescence spectra of the thin films clearly show emission bands at about 1.63 and 2.32 eV at room temperature, with no shift observed with decreasing temperature. A model was proposed for explaining such anomaly.

show abstract

Structural and optical properties of CuSe2 nanocrystals formed in thin solid Cu–Se film

Cited by 26 publications

References 37 publications

Compound Copper Chalcogenide Nanocrystals

Compound Copper Chalcogenide Nanocrystals

Impurity Phases and Optoelectronic Properties of CuSbSe2 Thin Films Prepared by Cosputtering Process for Absorber Layer in Solar Cells

Low-temperature photoluminescence of CuSe2 nano-objects in selenium thin films

Contact Info

Product

Resources

About