Enhanced Photocurrent and Electrically Pumped Quantum Dot Emission from Single Plasmonic Nanoantennas

被引：9

作者：

Huang, Junyang ^{[1
]}

Hu, Shu ^{[1
]}

Kos, Dean ^{[1
]}

Xiong, Yuling ^{[1
]}

Jakob, Lukas A. ^{[1
]}

Sanchez-Iglesias, Ana ^{[2
,3
]}

Guo, Chenyang ^{[1
]}

Liz-Marzan, Luis M. ^{[2
,4
]}

Baumberg, Jeremy J. ^{[1
]}

机构：

[1] Univ Cambridge, NanoPhoton Ctr, Dept Phys, Cavendish Lab, JJ Thompson Ave, Cambridge CB3 0HE, England

[2] C biomaGUNE, CIC biomaGUNE, Paseo Miramon 194, Donostia San Sebastian 20014, Spain

[3] Univ Basque Country, CSIC, Ctr Fis Mat, Manuel Lardizabal Ibilbidea 5, Donostia San Sebastian 20018, Spain

[4] Basque Fdn Sci, Ikerbasque, Bilbao 43009, Spain

来源：

ACS NANO | 2024年 / 18卷 / 04期

基金：

欧洲研究理事会;

关键词：

plasmonics; nanoantenna; quantumdot; photocurrent; electroluminescence; Stark shift; POLARIZABILITY; LASERS; CDSE;

D O I：

10.1021/acsnano.3c10092

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Integrating cavity-enhanced colloidal quantum dots (QDs) into photonic chip devices would be transformative for advancing room-temperature optoelectronic and quantum photonic technologies. However, issues with efficiency, stability, and cost remain formidable challenges to reach the single antenna limit. Here, we present a bottom-up approach that delivers single QD-plasmonic nanoantennas with electrical addressability. These QD nanojunctions exhibit robust photoresponse characteristics, with plasmonically enhanced photocurrent spectra matching the QD solution absorption. We demonstrate electroluminescence from individual plasmonic nanoantennas, extending the device lifetime beyond 40 min by utilizing a 3 nm electron-blocking polymer layer. In addition, we reveal a giant voltage-dependent redshift of up to 62 meV due to the quantum-confined Stark effect and determine the exciton polarizability of the CdSe QD monolayer to be 4 x 10(-5) meV/(kV/cm)(2). These developments provide a foundation for accessing scalable quantum light sources and high-speed, tunable optoelectronic systems operating under ambient conditions.

引用

页码：3323 / 3330

页数：8

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