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Title: Electronic Structure of the Plasmons in Metal Nanocrystals: Fundamental Limitations for the Energy Efficiency of Hot Electron Generation

Abstract

This Review discusses the electronic structure of plasmonic resonances in metal nanostructures, clarifying existing misconceptions on the topic. Here we underscore the key property of the plasmonic response in metal nanocrystals: the plasmon and its wave function are mostly composed of a large number of low-energy excitations, which involve electrons near the Fermi level. Simultaneously, some number of high-energy hot electrons are excited in a nanocrystal due to the scattering of electrons by surfaces and in hot spots. It is an established fact that plasmon excitations are well described by classical frameworks, considering the collective oscillation of low-energy carriers moving as the result of classical acceleration. This classical motion is intrinsically dissipative and leads to heating. On the other hand, the generation of hot electrons in nanocrystals is a quantum surface effect. The energy efficiency of such Metal Semiconductor hot-electron processes is always limited. However, there are interesting possibilities for the hot-electron enhancement, which we discuss here in the context of applications for plasmonic photodetectors, photocatalysis, and ultrafast spectroscopy.

Authors:
 [1]; ORCiD logo [2];  [1];  [3];  [4];  [1]; ORCiD logo [5]
  1. Univ. of Electronic Science and Technology of China, Chengdu (China). Inst. of Fundamental and Frontier Sciences
  2. Univ. of Electronic Science and Technology of China, Chengdu (China). Inst. of Fundamental and Frontier Sciences; Inst. National de la Recherche Scientifique (INRS), Québec (Canada). Centre Énergie Matériaux et Télécommunications
  3. Ohio Univ., Athens, OH (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  5. Univ. of Electronic Science and Technology of China, Chengdu (China). Inst. of Fundamental and Frontier Sciences; Ohio Univ., Athens, OH (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); China Postdoctoral Science Foundation; National Natural Science Foundation of China (NSFC); Volkswagen Foundation; National Basic Research Program of China; University of Electronic Science and Technology of China (UESTC)
OSTI Identifier:
1608036
Grant/Contract Number:  
AC02-06CH11357; 2018M643438
Resource Type:
Accepted Manuscript
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 4; Journal Issue: 10; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Metals; Plasmonics; Scattering; Electrical energy; Plasmons

Citation Formats

Chang, Le, Besteiro, Lucas V., Sun, Jiachen, Santiago, Eva Yazmin, Gray, Stephen K., Wang, Zhiming, and Govorov, Alexander O. Electronic Structure of the Plasmons in Metal Nanocrystals: Fundamental Limitations for the Energy Efficiency of Hot Electron Generation. United States: N. p., 2019. Web. doi:10.1021/acsenergylett.9b01617.
Chang, Le, Besteiro, Lucas V., Sun, Jiachen, Santiago, Eva Yazmin, Gray, Stephen K., Wang, Zhiming, & Govorov, Alexander O. Electronic Structure of the Plasmons in Metal Nanocrystals: Fundamental Limitations for the Energy Efficiency of Hot Electron Generation. United States. https://doi.org/10.1021/acsenergylett.9b01617
Chang, Le, Besteiro, Lucas V., Sun, Jiachen, Santiago, Eva Yazmin, Gray, Stephen K., Wang, Zhiming, and Govorov, Alexander O. Mon . "Electronic Structure of the Plasmons in Metal Nanocrystals: Fundamental Limitations for the Energy Efficiency of Hot Electron Generation". United States. https://doi.org/10.1021/acsenergylett.9b01617. https://www.osti.gov/servlets/purl/1608036.
@article{osti_1608036,
title = {Electronic Structure of the Plasmons in Metal Nanocrystals: Fundamental Limitations for the Energy Efficiency of Hot Electron Generation},
author = {Chang, Le and Besteiro, Lucas V. and Sun, Jiachen and Santiago, Eva Yazmin and Gray, Stephen K. and Wang, Zhiming and Govorov, Alexander O.},
abstractNote = {This Review discusses the electronic structure of plasmonic resonances in metal nanostructures, clarifying existing misconceptions on the topic. Here we underscore the key property of the plasmonic response in metal nanocrystals: the plasmon and its wave function are mostly composed of a large number of low-energy excitations, which involve electrons near the Fermi level. Simultaneously, some number of high-energy hot electrons are excited in a nanocrystal due to the scattering of electrons by surfaces and in hot spots. It is an established fact that plasmon excitations are well described by classical frameworks, considering the collective oscillation of low-energy carriers moving as the result of classical acceleration. This classical motion is intrinsically dissipative and leads to heating. On the other hand, the generation of hot electrons in nanocrystals is a quantum surface effect. The energy efficiency of such Metal Semiconductor hot-electron processes is always limited. However, there are interesting possibilities for the hot-electron enhancement, which we discuss here in the context of applications for plasmonic photodetectors, photocatalysis, and ultrafast spectroscopy.},
doi = {10.1021/acsenergylett.9b01617},
journal = {ACS Energy Letters},
number = 10,
volume = 4,
place = {United States},
year = {Mon Sep 16 00:00:00 EDT 2019},
month = {Mon Sep 16 00:00:00 EDT 2019}
}

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Works referencing / citing this record:

A Visible and Near-IR Tunnel Photosensor with a Nanoscale Metal Emitter: The Effect of Matching of Hot Electrons Localization Zones and a Strong Electrostatic Field
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