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Tuning and Modulation of the Photoinduced Current by Rectification of Surface Plasmons in Metal–Molecule–Nanoparticle–ITO Composite Junctions

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2024

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Deutsche Forschungsgemeinschaft (DFG): 406778771
Deutsche Forschungsgemeinschaft (DFG): SFB 1432 425217212
National Natural Science Foundation of China: 11804170
National Natural Science Foundation of China: 22273041
National Natural Science Foundation of China: 91950116

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The Journal of Physical Chemistry C. ACS Publications. 2024, 128(20), S. 8315-8323. ISSN 1932-7447. eISSN 1932-7455. Verfügbar unter: doi: 10.1021/acs.jpcc.4c01726

Zusammenfassung

Au nanoparticles (AuNPs) are prime candidates to build up device components for light-harvesting and photon–electron conversion. AuNPs respond to light irradiation by creating localized surface plasmons (LSPs), coupling with neighboring AuNPs and the substrate, to generate intense fields. Here, we present a novel optoelectronic multilayer heterostructure to transmit the LSP response directly into alternating current (AC) on the tens of nanoampere level under modulated laser illumination in the hundred kilohertz range. The device is composed of a metal bottom layer, a self-assembled molecular monolayer (SAM), AuNPs, and indium tin oxide (ITO) as the transparent top layer. We show that ITO is a suitable material for the top electrode of the device because of its higher optical transparency for a given thickness, and we discuss the optoelectronic properties of the heterostructure. Furthermore, we show that the AC response can be tuned by a direct current (DC) bias, the illumination power, and wavelength, and we study the position dependencies of the LSP signal, thereby illustrating the multiple controllability of the heterostructure device. The investigation presents a novel device concept and contributes to future nanoscale applications in fundamental research, sensing, and energy harvesting based on the AC optoelectronic response. The novel design of the heterostructure could also lead to possible approaches for AC optoelectric converter applications.

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540 Chemie

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ISO 690WANG, Maoning, Valentin BARTH, Sergii SNEGIR, Lukas HOLZ, Thomas HUHN, Johannes BONEBERG, Chenyang GUO, Mengqi FU, Dong XIANG, Paul LEIDERER, Fan YANG, Elke SCHEER, 2024. Tuning and Modulation of the Photoinduced Current by Rectification of Surface Plasmons in Metal–Molecule–Nanoparticle–ITO Composite Junctions. In: The Journal of Physical Chemistry C. ACS Publications. 2024, 128(20), S. 8315-8323. ISSN 1932-7447. eISSN 1932-7455. Verfügbar unter: doi: 10.1021/acs.jpcc.4c01726
BibTex
@article{Wang2024Tunin-70066,
  year={2024},
  doi={10.1021/acs.jpcc.4c01726},
  title={Tuning and Modulation of the Photoinduced Current by Rectification of Surface Plasmons in Metal–Molecule–Nanoparticle–ITO Composite Junctions},
  number={20},
  volume={128},
  issn={1932-7447},
  journal={The Journal of Physical Chemistry C},
  pages={8315--8323},
  author={Wang, Maoning and Barth, Valentin and Snegir, Sergii and Holz, Lukas and Huhn, Thomas and Boneberg, Johannes and Guo, Chenyang and Fu, Mengqi and Xiang, Dong and Leiderer, Paul and Yang, Fan and Scheer, Elke}
}
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