Copper‐Based Ternary and Quaternary Semiconductor Nanoplates: Templated Synthesis, Characterization, and Photoelectrochemical Properties

Wu, Xue‐Jun; Huang, Xiao; Qi, Xiaoying; Li, Hai; Li, Bing; Zhang, Hua

doi:10.1002/anie.201403655

Cited by 126 publications

(113 citation statements)

References 42 publications

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“…It should also be noted that the chalcopyrite (112) facets, are polar as they are terminated with either cations or anions. 50 Therefore, polarity driven stabilization of the superstructures must also be considered. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 16 nanosheet, which we hypothesize, is caused by strain during a crystal ripening process.…”

Section: Chemistry Of Materialsmentioning

confidence: 99%

Folded Nanosheets: A New Mechanism for Nanodisk Formation

2016

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Two dimensional nanostructures have generated significant interest in the scientific community due to their high surface area and remarkable optoelectronic properties. In this work, we present a simple colloidal synthesis for ultrathin nanosheets of both In 2 S 3 and CuInS 2 , and discussed the detail of the crystal growth as well its transformation into 2-D nanodisks with due course of annealing. Contradictory phase designation reports exist as to the structure of In 2 S 3 at the nanoscale, due to overlapping reflections of multiple phases in X-ray diffraction. We use high resolution transmission electron microscopy to demonstrate definitively that hexagonal γ-In 2 S 3 is formed. Treatment of the In 2 S 3 nanosheet with Cu + accelerates this process of tearing of nanosheet of In 2 S 3 and results in the formation of 1D nanoribbons of CuInS 2 at a particular temperature with proper combination of solvent polarity. High-resolution TEM images and medium-angle x-ray scattering measurements indicate that these nanoribbons consist of face-to-face stacked nanodisks.

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Section: Chemistry Of Materialsmentioning

confidence: 99%

Folded Nanosheets: A New Mechanism for Nanodisk Formation

2016

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“…[42][43][44][45] To overcome such drawbacks of the composition control, template synthesis through cation exchange 46 has been gaining popularity, and allowed for fabrication of ternary and quaternary NCs (such as CuInS 2 , CuInSe 2 , AgInSe 2 , CuIn x Ga 1-x S, Cu 2 ZnSnS 4 ) from respective binary NCs (such as Cu 2-x S, Cu 2-x Se, Ag 2 Se). [47][48][49][50][51][52][53] Most of these methods start from binary copper (I) sulfide/selenide, and the cation exchange takes place at high temperatures. In 2 S 3 is a III−VI group semiconductor with a bandgap of 2.0-2.3 eV, which may exist in three different crystal phases: α-In 2 S 3 (defective cubic structure), β-In 2 S 3 (defective spinel structure) and γ-In 2 S 3 (layered hexagonal structure).…”

Section: Introductionmentioning

confidence: 99%

Template Synthesis of CuInS₂ Nanocrystals from In₂S₃ Nanoplates and Their Application as Counter Electrodes in Dye-Sensitized Solar Cells

et al. 2015

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We report the room temperature template synthesis of CuInS 2 nanocrystals through incorporation of Cu + cations into In 2 S 3 nanoplates whose chemical composition has been controlled by varying the amount of copper ions in the reaction mixture. As a result, bandgaps of the resultant CuInS 2 nanoplates can be tuned from 1.45 to 1.19 eV with [Cu]/[In] molar ratios increasing from 0.7 to 2.9, which was demonstrated by the cyclic voltammetry. We explored the use of CuInS 2 nanocrystals as potential counter electrode in dye-sensitized solar cells and a power conversion efficiency of 6.83 % was achieved without selenization and ligand exchange. The value is comparable with the performance of control device using a Pt as counter electrode (power conversion efficiency: 7.08 %) under the same device architecture. IntroductionTernary and quaternary semiconductor nanocrystals (NCs) (e.g., CuInS 2 , CuInSe 2 , CuInGaS 2 , CuZnSnS 4 ) with advantages of tunable bandgaps and more environmentally friendly constituents have been receiving great attentions for solar-harvesting and light-emitting applications, in particular for solution-processed devices. 1-17 For example, CuInS 2 NCs are regarded as promising candidates as light absorber or counter electrode (CE) in dye-sensitized solar cells (DSSCs), due to the advantage of low cost and simple fabrication process. 18-23 Because the electronic structure of these materials strongly correlate with the [Cu]/[In] ratios, there is a great need to precisely control their size, shape, surface and compositions. 3,19,24,25 Although great success has been made in synthesis of ternary and quaternary NCs, providing several routes including thermal decomposition of single precursors, 26-30 solvothermal synthesis approach, 31-33 hot-injection 4,5,34-36 and non-injection methods, 7, 37-41 the different reactivity of metallic cation precursors often leads to a poor stoichiometric control and the formation of intermediate products such as biphasic nanomaterials and heterostructures. [42][43][44][45] To overcome such drawbacks of the composition control,

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“…Recently, the ternary and quaternary metal chalcogenide families have shown great potential as candidates for thin film solar cells due to their low band gap energy, large absorption coefficient and high photo-stability [1]. Among these, CdTe, CuIn(SSe) 2 and Cu(InGa)(SSe) 2 have been the most extensively studied and have been shown to achieve solar energy conversion efficiencies of $ 20% [2,3].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Cu2SnS3 thin film solar cells using pulsed laser deposition technique

Vanalakar

Agawane

Kamble

et al. 2015

Solar Energy Materials and Solar Cells

112

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Copper‐Based Ternary and Quaternary Semiconductor Nanoplates: Templated Synthesis, Characterization, and Photoelectrochemical Properties

Cited by 126 publications

References 42 publications

Folded Nanosheets: A New Mechanism for Nanodisk Formation

Folded Nanosheets: A New Mechanism for Nanodisk Formation

Template Synthesis of CuInS₂ Nanocrystals from In₂S₃ Nanoplates and Their Application as Counter Electrodes in Dye-Sensitized Solar Cells

Fabrication of Cu2SnS3 thin film solar cells using pulsed laser deposition technique

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Copper‐Based Ternary and Quaternary Semiconductor Nanoplates: Templated Synthesis, Characterization, and Photoelectrochemical Properties

Cited by 126 publications

References 42 publications

Folded Nanosheets: A New Mechanism for Nanodisk Formation

Folded Nanosheets: A New Mechanism for Nanodisk Formation

Template Synthesis of CuInS2 Nanocrystals from In2S3 Nanoplates and Their Application as Counter Electrodes in Dye-Sensitized Solar Cells

Fabrication of Cu2SnS3 thin film solar cells using pulsed laser deposition technique

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Product

Resources

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Template Synthesis of CuInS₂ Nanocrystals from In₂S₃ Nanoplates and Their Application as Counter Electrodes in Dye-Sensitized Solar Cells