Journal article 1093 views 242 downloads
Field Effect and Photoconduction in Au25 Nanoclusters Films
Michael Galchenko,
Andrés Black,
Leonard Heymann,
Christian Klinke 
Advanced Materials, Volume: 31, Issue: 18, Start page: 1900684
Swansea University Author:
Christian Klinke
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DOI (Published version): 10.1002/adma.201900684
Abstract
Quantum confined Au nanoclusters exhibit molecule-like properties, including atomic precision and discrete energy levels. The electrical conductivity of Au nanocluster films can vary by several orders of magnitude, and is determined by the strength of the electronic coupling between the individual n...
| Published in: | Advanced Materials |
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| ISSN: | 0935-9648 1521-4095 |
| Published: |
2019
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa50213 |
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| Abstract: |
Quantum confined Au nanoclusters exhibit molecule-like properties, including atomic precision and discrete energy levels. The electrical conductivity of Au nanocluster films can vary by several orders of magnitude, and is determined by the strength of the electronic coupling between the individual nanoclusters in the film. Similar to quantum confined, semiconducting quantum dots, the electrical coupling in films is dependent on the size and structure of the Au core and the length and conjugation of the organic ligands surrounding it. Unlike quantum dots, however, semiconducting transport has not been reported in Au nanocluster films. We demonstrate that through a simple yet careful choice of cluster size and organic ligands, stable Au nanocluster films can electronically couple and become semiconducting, exhibiting electric field effect and photoconductivity. The molecule-like nature of the Au nanoclusters is evidenced by a hopping transport mechanism reminiscent of doped, disordered organic semiconductor films. These results demonstrate the potential of metal nanoclusters as a solution processed material for semiconducting devices. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
18 |
| Start Page: |
1900684 |