Nanoporous TiO2/Cu1.8S heterojunctions for solar energy conversion

Reijnen, Liesbeth; Meester, Ben; Goossens, Albert; Schoonman, J.

doi:10.1016/s0928-4931(01)00406-4

Cited by 71 publications

(44 citation statements)

References 5 publications

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“…These spectra reveal that the Cu-deficients decrease with increase in the number of alkyl-chains because the peak intensity is proportional to the amount of Cudeficients. [12][13][14][15] In the spectrum of copper sulfide NCs prepared with TOCA, no near IR absorption peak was observed, indicating that the brown precipitate is nearly pure Cu 2 S. These results are consistent with the XRD results shown in Fig. 4.…”

Section: Resultssupporting

confidence: 87%

Morphology and Composition-Controls of CuxS Nanocrystals Using Alkyl-Amine Ligands

2006

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Nearly monodispersed-size Cu x S nanocrystals(NCs) were obtained by sulfuration of Cu(II)-alkyl-amine complexes using dodecanethiolsolvated sulfur at 363 K. The morphology and chemical composition of Cu x S NCs can be controlled by using appropriate alkyl-amine ligands. NCs of Cu-deficient sulfides, Cu 1:8 S (digenite) or a Cu 1:8 S-Cu 2 S mixture, were obtained using octylamine or di-octylamine, while stoichiometric Cu 2 S NCs using tri-octylamine and oleylamine ligands.

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Section: Resultssupporting

confidence: 87%

Morphology and Composition-Controls of CuxS Nanocrystals Using Alkyl-Amine Ligands

2006

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“…The atomic layer deposition technique is uniquely qualified to infiltrate porous materials and indeed 3D nanocomposites of TiO 2 and CuInS 2 with In 2 S 3 as the buffer can be obtained [17][18][19][20][21]. With Rutherford backscattering and grazing incidence XRD it has been shown that infiltration of nanoporous TiO 2 is possible, although absolute numbers of the void fraction after infiltration have not been obtained [19].…”

Section: Introductionmentioning

confidence: 99%

Spray-deposited CuInS₂solar cells

Goossens

Hofhuis

2008

Nanotechnology

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Spray deposition of CuInS 2 offers an attractive route towards industrial production of thin-film solar cells. With spray deposition it is possible to make nanocomposites of n-type TiO 2 and p-type CuInS 2 . Upon application of an In 2 S 3 buffer layer, solar cells can be made with efficiencies of ∼7%, being comparable to that of amorphous silicon. Rapid thermal annealing is not involved in the production of these solar cells. In order to further improve the performance, the concentration of electronic defect states in the bandgap must be reduced. Towards this end a detailed study has been undertaken to elucidate the role of associated point defects in the recombination of electron-hole pairs. Especially with transient absorption spectroscopy it is possible to make an accurate assessment of the fundamental electronic processes that are involved. We find electronic states in the bandgap related to the presence of anti-site defects. In addition, indium vacancies are also involved. State-to-state recombination occurs, indicating that the involved defects are associated. An electronic state located at 1.1 eV above the valence band, which is related to indium on a copper position, has a lifetime of about 20 μs at room temperature. The lower lying states related to copper on indium positions, and indium vacancies, are populated from this 1.1 eV state.

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“…Nanosized titania (TiO 2 ) has attracted much attention from researchers for many years among broad areas such as catalysts [1], water-splitting for hydrogen production [2,3], water purification [4][5][6], photocatalytic degradation of indoor air pollutant acetaldehyde [7] , solar energy conversion [8], self-cleaning thin films [9][10], because of its good photocatalytic activity, stability, untoxicity, and inexpensiveness. Many of the studies have focused on the synthetic methods, which may be divided into solid, liquid, and gas methods, respectively.…”

Section: Introductionmentioning

confidence: 99%

Low‐Temperature Preparation and Characterization of Nanosized Crystalline Anatase Titania with Titanium Tetrachloride and Acetic Anhydride as Materials

Chen

Shen

2009

Chem Eng & Technol

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When titanium tetrachloride and acetic anhydride were mixed, an acute reaction occurred immediately. The products, titanyl acetate chloride organic compounds, were studied with FTIR and TGA. The results indicated that they were composed of two dimmers [(CH 3 CO 2 TiOCl) 2 and (CH 3 CO 2 TiCl 2 ) 2 O] in which a Ti atom combined with acetate in the way of coordinative bonding. In those dimmers, there are frameworks of Ti-O-Ti chemical bridges that are favorable units for forming nanosized crystalline titania. At low temperature (60°C) and normal pressure, the titanyl acetate chloride organic compounds can hydrolyze to form nanosized crystalline anatase titania globate particles, 5-7 nm in size, which were approved by XRD (x-ray diffraction), TEM (transmission electron microscope), and LS (laser scattering). And more, the experiments of photocatalytic degradation of the dye rohdamine B revealed the nanosized crystalline anatase titania powders prepared with titanium tetrachloride and acetic anhydride as materials have a good photocatalytic activity.

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Nanoporous TiO2/Cu1.8S heterojunctions for solar energy conversion

Cited by 71 publications

References 5 publications

Morphology and Composition-Controls of Cu<I><SUB>x</SUB></I>S Nanocrystals Using Alkyl-Amine Ligands

Morphology and Composition-Controls of Cu<I><SUB>x</SUB></I>S Nanocrystals Using Alkyl-Amine Ligands

Spray-deposited CuInS₂solar cells

Low‐Temperature Preparation and Characterization of Nanosized Crystalline Anatase Titania with Titanium Tetrachloride and Acetic Anhydride as Materials

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Nanoporous TiO2/Cu1.8S heterojunctions for solar energy conversion

Cited by 71 publications

References 5 publications

Morphology and Composition-Controls of Cu<I><SUB>x</SUB></I>S Nanocrystals Using Alkyl-Amine Ligands

Morphology and Composition-Controls of Cu<I><SUB>x</SUB></I>S Nanocrystals Using Alkyl-Amine Ligands

Spray-deposited CuInS2solar cells

Low‐Temperature Preparation and Characterization of Nanosized Crystalline Anatase Titania with Titanium Tetrachloride and Acetic Anhydride as Materials

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Product

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Spray-deposited CuInS₂solar cells