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http://hdl.handle.net/1942/16047
Title: | Annealing of sulfide stabilized colloidal semiconductor nanocrystals | Authors: | Dierick, Ruben Capon, Boris DAMM, Hanne Flamee, Stijn Arickx, Pieter Bruneel, Els VAN GENECHTEN, Dirk VAN BAEL, Marlies HARDY, An Detavernier, Christophe Zeger, Hens |
Issue Date: | 2014 | Source: | Journal of Materials Chemistry C, 2 (1), p. 178-183 | Abstract: | The effect of thermal annealing on layers of CuInS2 nanocrystals (NCs) stabilized with (NH4)2S was investigated using in situ transmission electron microscopy (TEM), in situ X-ray diffraction (XRD), thermogravimetric analysis combined with mass spectrometry (TGA-MS) and X-ray photoelectron spectroscopy (XPS). It is shown that these inorganic, chalcogen containing ligands inhibit NC sintering up to 450 C in an inert atmosphere. On the other hand, sintering can be promoted by annealing in hydrogen gas. A similar behavior is found with Cu2ZnSnSe4 and CdSe NCs. We attribute the inhibited sintering to the oxidation of the S2 originally stabilizing the NCs to sulfite or sulfate moieties, where oxidation is possible either by exposure of the films to air or by thermal decomposition of residual solvent molecules present in the film under inert conditions. | Notes: | Hens, Z (reprint author), Univ Ghent, Krijgslaan 281-S3, B-9000 Ghent, Belgium ruben.dierick@ugent.be; zeger.hens@ugent.be | Document URI: | http://hdl.handle.net/1942/16047 | ISSN: | 2050-7526 | e-ISSN: | 2050-7534 | DOI: | 10.1039/C3TC31393J | ISI #: | 000327849500022 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2015 |
Appears in Collections: | Research publications |
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annealing 1.pdf Restricted Access | Published version | 1.36 MB | Adobe PDF | View/Open Request a copy |
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