Structure–Transport Correlation Reveals Anisotropic Charge Transport in Coupled PbS Nanocrystal Superlattices
| Autor: | Monika Fleischer, Dmitry Lapkin, Marcus Scheele, Ivan A. Vartanyants, Annika Bräuer, Alexandr Ignatenko, Frank Schreiber, Philipp Frech, Ruslan Khubbutdinov, Sergey Lazarev, Florian Laible, Michael Sprung, Andre Maier, Nastasia Mukharamova, Thomas Günkel, Dameli Assalauova, Nicolas Previdi, Ronny Löffler |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Condensed matter physics Mechanical Engineering Superlattice Charge (physics) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Condensed Matter::Materials Science Nanocrystal chemistry Mechanics of Materials Electrical resistivity and conductivity ddc:660 General Materials Science Charge carrier Self-assembly Lead sulfide 0210 nano-technology Anisotropy |
| Zdroj: | Advanced materials 32, 2002254 (2020). doi:10.1002/adma.202002254 |
| DOI: | 10.3204/pubdb-2020-04373 |
| Popis: | Advanced materials 32, 2002254 (2020). doi:10.1002/adma.202002254 The assembly of colloidal semiconductive nanocrystals into highly ordered superlattices predicts novel structure‐related properties by design. However, those structure–property relationships, such as charge transport depending on the structure or even directions of the superlattice, have remained unrevealed so far. Here, electric transport measurements and X‐ray nanodiffraction are performed on self‐assembled lead sulfide nanocrystal superlattices to investigate direction‐dependent charge carrier transport in microscopic domains of these materials. By angular X‐ray cross‐correlation analysis, the structure and orientation of individual superlattices is determined, which are directly correlated with the electronic properties of the same microdomains. By that, strong evidence for the effect of superlattice crystallinity on the electric conductivity is found. Further, anisotropic charge transport in highly ordered monocrystalline domains is revealed, which is attributed to the dominant effect of shortest interparticle distance. This implies that transport anisotropy should be a general feature of weakly coupled nanocrystal superlattices. Published by Wiley-VCH, Weinheim |
| Databáze: | OpenAIRE |
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