Photoluminescence of indium-rich copper indium sulfide quantum dots

Liu, Wenyan; Zhang, Yu; Zhao, Jingzhe; Feng, Yi; Wang, Dan; Zhang, Tieqiang; Gao, Wenzhu; Chu, Hairong; Yin, Jingzhou; Wang, Yiding; Zhao, Jianlin; Yu, William W.

doi:10.1016/j.jlumin.2015.02.029

Cited by 30 publications

(38 citation statements)

References 55 publications

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“…The photoluminescence spectra of CIZSe QDs display a slight blue-shift with the decrease of the Cu/In ratio with the absorption onset of this sample also exhibiting the same trend as the Cu/In ratio decreased. It is believed that decreasing the Cu concentration in the CIZSe QDs leads to the increase of the band gap [70] and is consistent with the observations from other reports [79,103,104]. The same type of behaviour has also been demonstrated in CZTS QDs, with the bandgap also able to be tuned from 1.56 to 1.83 eV by varying the compositional ratios of Cu and Zn [105].…”

Section: Unique Optical Properties Of Cu-based Multicomponent Qdssupporting

confidence: 84%

Optical Properties, Synthesis, and Potential Applications of Cu-Based Ternary or Quaternary Anisotropic Quantum Dots, Polytypic Nanocrystals, and Core/Shell Heterostructures

2019

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This review summaries the optical properties, recent progress in synthesis, and a range of applications of luminescent Cu-based ternary or quaternary quantum dots (QDs). We first present the unique optical properties of the Cu-based multicomponent QDs, regarding their emission mechanism, high photoluminescent quantum yields (PLQYs), size-dependent bandgap, composition-dependent bandgap, broad emission range, large Stokes’ shift, and long photoluminescent (PL) lifetimes. Huge progress has taken place in this area over the past years, via detailed experimenting and modelling, giving a much more complete understanding of these nanomaterials and enabling the means to control and therefore take full advantage of their important properties. We then fully explore the techniques to prepare the various types of Cu-based ternary or quaternary QDs (including anisotropic nanocrystals (NCs), polytypic NCs, and spherical, nanorod and tetrapod core/shell heterostructures) are introduced in subsequent sections. To date, various strategies have been employed to understand and control the QDs distinct and new morphologies, with the recent development of Cu-based nanorod and tetrapod structure synthesis highlighted. Next, we summarize a series of applications of these luminescent Cu-based anisotropic and core/shell heterostructures, covering luminescent solar concentrators (LSCs), bioimaging and light emitting diodes (LEDs). Finally, we provide perspectives on the overall current status, challenges, and future directions in this field. The confluence of advances in the synthesis, properties, and applications of these Cu-based QDs presents an important opportunity to a wide-range of fields and this piece gives the reader the knowledge to grasp these exciting developments.

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Section: Unique Optical Properties Of Cu-based Multicomponent Qdssupporting

confidence: 84%

Optical Properties, Synthesis, and Potential Applications of Cu-Based Ternary or Quaternary Anisotropic Quantum Dots, Polytypic Nanocrystals, and Core/Shell Heterostructures

2019

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“…CuInS2 composition, with the brightest samples having Cu:In ratios from 0.4 to 0.8. 74,[125][126][127] ZnS and…”

Section: Copper-based Semiconductor Nanocrystalsmentioning

confidence: 99%

“…64,72 Not just the absorption spectra (Figure 16), but also the PL spectra ( Figure 9B), PL lifetimes and temperature dependence ( Figure 17), and even MCPL ( Figure 17) data are similar. The PL of CuInS2 and related NCs is typically interpreted in the same way as bulk CuInS2, by invoking various point defects, 68,69,71,73,74,77,92,116,126,127,157,[171][172][173][174][175][176][177][178][179][180][181][182][183] but these spectroscopic similarities suggest that similar microscopic descriptions of the luminescent excited states of Cu + -doped and Cu + -based semiconductor NCs likely apply. Importantly, the PL of CuInS2 NCs is qualitatively very different from that of bulk CuInS2.…”

Section: Mechanism Of Photoluminescence In Cuins2 Nanocrystalsmentioning

confidence: 99%

“…68,69,172,175,176 As in the bulk materials, these donor and acceptor states have been associated with InCu or anion vacancy (VS or VSe) defects, and copper vacancies (VCu), respectively. 126,127,177 One of the strongest pieces of evidence for the DAP mechanism is the observation of a PL redshift on the 100-nanosecond timescale in gated PL measurements, 69,157 although some reports attribute this redshift to size-dependent surface trapping kinetics. 73,178 With DAP recombination, the distribution of donor-acceptor distances generates a distribution of PL energies and rate constants, 10 which causes an apparent redshift in the PL peak energy over time.…”

Section: Mechanism Of Photoluminescence In Cuins2 Nanocrystalsmentioning

confidence: 99%

“…73,77,127 It has also been proposed that the DAP and "free-to-bound" mechanisms coexist as competitive recombination pathways in CuInS2 NCs, with the dominant mechanism determined by the NC stoichiometry and whether the NC is shelled. 127,173,177 Overall, several studies agree upon the general description of CuInS2 and CuInSe2 NC PL as a "free-to-bound" recombination involving a delocalized CB electron and a hole localized at a point defect. 71,73,77,174,181,194 A few reports assign the PL in CuInS2 NCs to a "free-to-bound" recombination in which the electron is localized at a point defect and the hole is delocalized in the VB.…”

Section: Mechanism Of Photoluminescence In Cuins2 Nanocrystalsmentioning

confidence: 99%

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Luminescent Colloidal Semiconductor Nanocrystals Containing Copper: Synthesis, Photophysics, and Applications

et al. 2016

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Copper-doped semiconductors are classic phosphor materials that have been used in a variety of applications for many decades. Colloidal copper-doped semiconductor nanocrystals have recently attracted a great deal of interest because they combine the solution processability and spectral tunability of colloidal nanocrystals with the unique photoluminescence properties of copper-doped semiconductor phosphors. Although ternary and quaternary semiconductors containing copper, such as CuInS2 and Cu2ZnSnS4, have been studied primarily in the context of their photovoltaic applications, when synthesized as colloidal nanocrystals, these materials have photoluminescence properties that are remarkably similar to those of copper-doped semiconductor nanocrystals. This review focuses on the luminescent properties of colloidal copper-doped, copperbased, and related copper-containing semiconductor nanocrystals. Fundamental investigations into the luminescence of copper-containing colloidal nanocrystals are reviewed in the context of the well-established luminescence mechanisms of bulk copper-doped semiconductors and copper(I) molecular coordination complexes. The use of colloidal copper-containing nanocrystals in applications that take advantage of their luminescent properties, such as bio-imaging, solid-state lighting, and luminescent solar concentrators, is also discussed. a Measured at 20 K b Measured in a PV device 2. Synthesis and Structural Characterization of Colloidal Copper-Containing Nanocrystals Progress in the synthesis of luminescent copper-doped colloidal semiconductor NCs mirrors that in the synthesis of colloidal semiconductor NCs in general. The earliest reports from the mid-1980s through the 1990s describe the synthesis of copper-doped CdS and ZnS colloidal NCs by simply adding small amounts of copper salts to the aqueous-phase arrested precipitation reactions

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Investigating the effect of Zn doping and temperature on the photoluminescence behaviour of CuLaSe₂ quantum dots

Çadırcı,

Elibol,

Demirci

et al. 2024

Luminescence

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In this study, CuLaSe2 and ZnCuLaSe2 quantum dots (QDs) with a mean size of ~4 nm were synthesized and characterized, and their temperature‐dependent photoluminescence (PL) properties were studied in the temperature range from 90 to 300 K for the first time. The results show that the obtained QDs were spherical and revealed excitonic band gaps. The PL intensity for both types of materials decreased when increasing the temperature to 300 K, which was attributed to the nonradiative relaxation and thermal escape mechanisms. As the temperature was increased, the PL linewidths broadened, and PL peak energies were red shifted for both types of QDs due to the exciton–phonon coupling and lattice deformation potential mechanisms. In addition, we found that as the temperature was decreased, the PL spectrum of ZnCuLaSe2 QDs contained two extra components, which could be attributed to the shallow defect sites (low energy peak) and the crystal phase transition process (high energy peak). The spectrum of CuLaSe2 QDs contained one extra component, which could be attributed to the crystal phase transition process.

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Photoluminescence of indium-rich copper indium sulfide quantum dots

Cited by 30 publications

References 55 publications

Optical Properties, Synthesis, and Potential Applications of Cu-Based Ternary or Quaternary Anisotropic Quantum Dots, Polytypic Nanocrystals, and Core/Shell Heterostructures

Optical Properties, Synthesis, and Potential Applications of Cu-Based Ternary or Quaternary Anisotropic Quantum Dots, Polytypic Nanocrystals, and Core/Shell Heterostructures

Luminescent Colloidal Semiconductor Nanocrystals Containing Copper: Synthesis, Photophysics, and Applications

Investigating the effect of Zn doping and temperature on the photoluminescence behaviour of CuLaSe₂ quantum dots

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Photoluminescence of indium-rich copper indium sulfide quantum dots

Cited by 30 publications

References 55 publications

Optical Properties, Synthesis, and Potential Applications of Cu-Based Ternary or Quaternary Anisotropic Quantum Dots, Polytypic Nanocrystals, and Core/Shell Heterostructures

Optical Properties, Synthesis, and Potential Applications of Cu-Based Ternary or Quaternary Anisotropic Quantum Dots, Polytypic Nanocrystals, and Core/Shell Heterostructures

Luminescent Colloidal Semiconductor Nanocrystals Containing Copper: Synthesis, Photophysics, and Applications

Investigating the effect of Zn doping and temperature on the photoluminescence behaviour of CuLaSe2 quantum dots

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Investigating the effect of Zn doping and temperature on the photoluminescence behaviour of CuLaSe₂ quantum dots