Hydrothermal Synthesis of Aqueous-Soluble Copper Indium Sulfide Nanocrystals and Their Use in Quantum Dot Sensitized Solar Cells

Santos, Calink I. L.; Machado, Wagner S.; Wegner, K. David; Gontijo, Leiriana Aparecida Pinto; Bettini, Jefferson; Schiavon, Marco A.; Reiß, Peter; Aldakov, Dmitry

doi:10.3390/nano10071252

Cited by 18 publications

(11 citation statements)

References 55 publications

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“…We have used a procedure based on Poisson statistics that is well-described and used for different semiconductors QDs in the literature. [1][2][3] The probability of having n excitons per QD is given by Eq. S4.…”

Section: Absorption Cross-section Measurementsmentioning

confidence: 99%

“…Heavy metal-free semiconductor nanocrystals have been extensively studied due to environmental issues. Ternary semiconductors such as copper indium sulfide (CIS) quantum dots (QDs) have displayed very interesting optoelectronic properties for applications in photovoltaic devices, − light-emitting diodes (LEDs), , photocatalytic hydrogen production, and biomarkers . CIS QD colloidal dispersions show long charge-carrier radiative recombination lifetimes (hundreds of nanoseconds), a large molar extinction coefficient from the visible to the near-infrared spectrum (10 5 L mol –1 cm –1 ), and large Stokes shifts (∼250–500 meV) free of reabsorption effects. , …”

Section: Introductionmentioning

confidence: 99%

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Revealing Exciton and Metal–Ligand Conduction Band Charge Transfer Absorption Spectra in Cu-Zn-In-S Nanocrystals

et al. 2020

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Heavy metal-free semiconductor nanocrystals such as copper indium sulfide quantum dots (QDs) have attracted substantial attention in recent years due to environmental issues and diverse applications. We report the synthesis and characterization of copper-zinc-indium-sulfide (CZIS) QDs and CZIS treated with excess Zn 2+ at different temperatures, denoted here as CZIS/ZnS 100 and CZIS/ZnS 200. Zn 2+ can diffuse into the lattice by an exchange-cation reaction, replacing Cu + and In 3+. We employed transient absorption (TA) spectroscopy to study the role of Zn 2+ in the lattice. The data were treated by global analysis, which yielded the decay associated spectra (DAS). Through DAS and second-order derivative absorption spectra, we could isolate the excitonic contribution from the metal ligand conduction band charge transfer (MLCBCT) absorption in the TA spectrum, finding the hole localization lifetime by its spectral and dynamical features. The hole localization lifetime increases from 0.3 to 1.7 ps by increasing the Zn 2+ concentration. We also measured the electron trapping constants to be 30 ps and larger than 1 ns. Finally, we concluded that the improvement in the photoluminescence quantum yield originates from accelerated radiative transition relative to the nonradiative component. A detailed mechanism was proposed, and our results suggest that the introduction of Zn 2+ in the lattice of CIS QDs could be beneficial for charge extraction.

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Section: Absorption Cross-section Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Revealing Exciton and Metal–Ligand Conduction Band Charge Transfer Absorption Spectra in Cu-Zn-In-S Nanocrystals

et al. 2020

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“…Due to their excellent optical and electrical properties, metal sulfide nanoparticles have been explored as functional components in various TSC types such as perovskite, copper indium sulfide (CIS), copper indium gallium sulfide (CIGS), copper indium gallium disulfoselenide (CIGSSe), organic, or dye sensitized solar cells (DSSC). [6][7][8][9][10][11][12][13][14][15] In this context, metal sulfide nanoparticles are predominantly explored for their potential as absorbers or charge (hole or electron) transport layers. Advantages of such an approach include (1) low cost, (2) light weight, (3) high flexibility in the design of the chemical and physical properties, (4) improved chemical and photochemical stability of the particles used in solar cell construction, and (5) good scalability via roll-to-roll processes compatibility with flexible materials.…”

Section: Introductionmentioning

confidence: 99%

Metal Sulfide Nanoparticle Synthesis with Ionic Liquids – State of the Art and Future Perspectives

et al. 2021

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Metal sulfides are among the most promising materials for a wide variety of technologically relevant applications ranging from energy to environment and beyond. Incidentally, ionic liquids (ILs) have been among the top research subjects for the same applications and also for inorganic materials synthesis. As a result, the exploitation of the peculiar properties of ILs for metal sulfide synthesis could provide attractive new avenues for the generation of new, highly specific metal sulfides for numerous applications. This article therefore describes current developments in metal sulfide nanoparticle synthesis as exemplified by a number of highlight examples. Moreover, the article demonstrates how ILs have been used in metal sulfide synthesis and discusses the benefits of using ILs over more traditional approaches. Finally, the article demonstrates some technological challenges and how ILs could be used to further advance the production and specific property engineering of metal sulfide nanomaterials, again based on a number of selected examples.

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“…At first, QDs research was mainly focused on the optimization of its structural, optical and electronic properties [9]. Since some decades, the QDs unique properties have attracted attention in other applications such as biomedical and solar cells [10,11]. We are involved in this work in the evolution of QD research in the solar cell field.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of quantum dots and their usage in solar cells: insight from the novel researches

et al. 2021

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Quantum dots (QDs) are three-dimensional (3D) quantum confinement materials with confined size on the nanoscale. They are semiconductors, possessing a tunable energy gap in the range of visible light energy. In QDs, the 3D quantum confinements of excitons result in tunable fluorescence emission relying upon the QDs size and shape when excited by monochromatic light. Besides, the attempts to improve their outstanding optoelectronic properties, i.e. superior to those of bulk, thin-film semiconductor and organic dyes, many efforts have been conducted, in recent times, regarding sustainable QDs synthesis aiming at biocompatibility and cost reduction. Among the green synthesis routes of QDs there are two distinguished; namely inorganic QDs and carbon-based QDs. The first route is made of low-bandgap metal chalcogenide either extracted from a living being, e.g. earthworm, or capped with an organic ligand. While, the second route is made of carbon-core and passivating the surface with different functional groups, namely carboxyl, hydroxyl, in addition to amine. These functional groups are derived from coke or organic carbon reservoir, i.e. fruits and their juice, animal, vegetable, spice and waste paper. Numerous fundamental applications of QDs, such as biomedicine, sensing, catalysis, and solar cells, exploit the characteristic fluorescence emission of QDs, quantum yields and their modulation upon interaction with the external environment. In this review, two prototype QDs examples are used to highlight the route to sustainable QDs synthesis and solar cells implementation and some perspectives.

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Hydrothermal Synthesis of Aqueous-Soluble Copper Indium Sulfide Nanocrystals and Their Use in Quantum Dot Sensitized Solar Cells

Cited by 18 publications

References 55 publications

Revealing Exciton and Metal–Ligand Conduction Band Charge Transfer Absorption Spectra in Cu-Zn-In-S Nanocrystals

Revealing Exciton and Metal–Ligand Conduction Band Charge Transfer Absorption Spectra in Cu-Zn-In-S Nanocrystals

Metal Sulfide Nanoparticle Synthesis with Ionic Liquids – State of the Art and Future Perspectives

Biosynthesis of quantum dots and their usage in solar cells: insight from the novel researches

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