Recent Developments in Colloidal Synthesis of CuInSe<sub>2</sub> Nanoparticles

Witt, Elena; Kolny‐Olesiak, Joanna

doi:10.1002/chem.201301076

Cited by 39 publications

(33 citation statements)

References 46 publications

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“…A survey of numerous literature reports suggests a remarkable consistency in the position of the photoluminescence band between CIS quantum dots prepared by different chemical approaches 22,25,29,34,35,41 , which suggests that the hole-like defect responsible for intragap emission is native to this material system. One possibility indicated by recent magneto-photoluminescence studies 42 is that the intragap hole state is associated with the Cu 2+ ion, which is a common substitutional impurity in II-VI semiconductors where it creates a fairly deep acceptor level 42,46,47 .…”

Section: Origin Of the Large Stokes Shift In I-iii-vi 2 Quantum Dotsmentioning

confidence: 95%

“…To evaluate this effect, a Farnsworth-Munsell 100 hue colour vision test was performed on 40 normal subjects 41,42 . To account for individual differences in colour sensitivity across the statistical population we repeated the test both without any filter and by filtering the subject's vision using LSC20 or Crs040 LSCs.…”

Section: Colorimetry Analysis Of Lscs Based On I-iii-vi 2 Quantum Dotsmentioning

confidence: 99%

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Highly efficient large-area colourless luminescent solar concentrators using heavy-metal-free colloidal quantum dots

et al. 2015

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Luminescent solar concentrators serving as semitransparent photovoltaic windows could become an important element in net zero energy consumption buildings of the future. Colloidal quantum dots are promising materials for luminescent solar concentrators as they can be engineered to provide the large Stokes shift necessary for suppressing reabsorption losses in large-area devices. Existing Stokes-shift-engineered quantum dots allow for only partial coverage of the solar spectrum, which limits their light-harvesting ability and leads to colouring of the luminescent solar concentrators, complicating their use in architecture. Here, we use quantum dots of ternary I-III-VI2 semiconductors to realize the first large-area quantum dot-luminescent solar concentrators free of toxic elements, with reduced reabsorption and extended coverage of the solar spectrum. By incorporating CuInSexS2-x quantum dots into photo-polymerized poly(lauryl methacrylate), we obtain freestanding, colourless slabs that introduce no distortion to perceived colours and are thus well suited for the realization of photovoltaic windows. Thanks to the suppressed reabsorption and high emission efficiencies of the quantum dots, we achieve an optical power efficiency of 3.2%. Ultrafast spectroscopy studies suggest that the Stokes-shifted emission involves a conduction-band electron and a hole residing in an intragap state associated with a native defect.

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Section: Origin Of the Large Stokes Shift In I-iii-vi 2 Quantum Dotsmentioning

confidence: 95%

Section: Colorimetry Analysis Of Lscs Based On I-iii-vi 2 Quantum Dotsmentioning

confidence: 99%

Highly efficient large-area colourless luminescent solar concentrators using heavy-metal-free colloidal quantum dots

et al. 2015

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][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][19][20][21][22][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.…”

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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“…These parameters depend on solvent, capping agent, temperature, and time [41][42][43]. To achieve narrow size distribution the nucleation should take place separately from growth of crystals.…”

Section: Resultsmentioning

confidence: 99%

One-pot thermolysis synthesis of CuInS2 nanoparticles with chalcopyrite-wurtzite polytypism structure

Vahidshad

Tahir

Mirkazemi

et al. 2015

J Mater Sci: Mater Electron

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CuInS 2 nanoparticles as the visible (wurtzite, 1.67 eV) or near infrared (chalcopyrite, 1.50 eV) light absorbing material in thin film solar cells, were synthesized using facile, one step heating up method by dissolving of CuCl, InCl 3 and SC(NH 2 ) 2 as precursors in oleylamine (OLA) alone or in combination with oleic acid (OA) and 1-octadecene (ODE) as solvent. The phase, size, morphology, and size distribution were controlled by the coordination ability between solvent molecules and metal precursors, reaction temperature and time. The presence of higher amounts of thiourea or OA to OLA led to the formation of chalcopyrite phase in comparison to wurtzite structure. Also, higher reaction temperatures ([240°C) resulted in favour of more chalcopyrite phase and higher crystallinity but the nanoparticles got agglomerated. As synthesized nanoparticles was characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, high resolution-transmission electronic microscopy, ultravioletvisible-near infrared, photoluminescence. The high resolution TEM confirmed the existence of chalcopyrite structure along with wurtzite structure in the nanocrystal (polytypism). Well controlled chalcopyrite CuInS 2 triangular pyramidal shape with an average size ranging from *10-20 nm size was obtained by using 20 ml OLA or 20 ml OLA along with 4 ml OA and ODE, respectively, with 210°C heating up and 4 h annealing time.

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Recent Developments in Colloidal Synthesis of CuInSe₂ Nanoparticles

Cited by 39 publications

References 46 publications

Highly efficient large-area colourless luminescent solar concentrators using heavy-metal-free colloidal quantum dots

Highly efficient large-area colourless luminescent solar concentrators using heavy-metal-free colloidal quantum dots

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

One-pot thermolysis synthesis of CuInS2 nanoparticles with chalcopyrite-wurtzite polytypism structure

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Recent Developments in Colloidal Synthesis of CuInSe2 Nanoparticles

Cited by 39 publications

References 46 publications

Highly efficient large-area colourless luminescent solar concentrators using heavy-metal-free colloidal quantum dots

Highly efficient large-area colourless luminescent solar concentrators using heavy-metal-free colloidal quantum dots

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

One-pot thermolysis synthesis of CuInS2 nanoparticles with chalcopyrite-wurtzite polytypism structure

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Recent Developments in Colloidal Synthesis of CuInSe₂ Nanoparticles

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