Energy Transfer from Quantum Dots to Graphene and MoS2: The Role of Absorption and Screening in Two-Dimensional Materials

被引：187

作者：

Raja, Archana ^{[1
]}

Montoya-Castillo, Andres ^{[1
]}

Zultak, Johanna ^{[2
,3
,8
]}

Zhang, Xiao-Xiao ^{[2
,3
]}

Ye, Ziliang ^{[2
,3
]}

Roquelet, Cyrielle ^{[2
,3
]}

Chenet, Daniel A. ^{[4
]}

van der Zande, Arend M. ^{[4
,9
]}

Huang, Pinshane ^{[1
,9
]}

Jockusch, Steffen ^{[1
]}

Hone, James ^{[4
]}

Reichman, David R. ^{[1
]}

Brus, Louis E. ^{[1
]}

Heinz, Tony F. ^{[5
,6
,7
]}

机构：

[1] Columbia Univ, Dept Chem, New York, NY 10027 USA

[2] Columbia Univ, Dept Phys, 538 W 120th St, New York, NY 10027 USA

[3] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA

[4] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA

[5] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[6] Stanford Univ, Dept Photon Sci, Stanford, CA 94305 USA

[7] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[8] Tech Univ Denmark, Dept Micro & Nanotechnol, Lyngby, Denmark

[9] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA

来源：

NANO LETTERS | 2016年 / 16卷 / 04期

基金：

美国国家科学基金会;

关键词：

Energy transfer; quantum dots; graphene; MoS2; transition metal dichalcogenides; dielectric screening; OPTICAL-PROPERTIES; CLASSICAL-THEORY; SINGLE; FRET;

D O I：

10.1021/acs.nanolett.5b05012

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report efficient nonradiative energy transfer (NRET) from core shell, semiconducting quantum dots to adjacent two-dimensional sheets of graphene and MoS2 of single- and few-layer thickness. We observe quenching of the photoluminescence (PL) from individual quantum dots and enhanced PL decay rates in time-resolved PL, corresponding to energy transfer rates of 1-10 ns(-1). Our measurements reveal contrasting trends in the NRET rate from the quantum dot to the van der Waals material as a function of thickness. The rate increases significantly with increasing layer thickness of graphene, but decreases with increasing thickness of MoS2 layers. A classical electromagnetic theory accounts for both the trends and absolute rates observed for the NRET. The countervailing trends arise from the competition between screening and absorption of the electric field of the quantum dot dipole inside the acceptor layers. We extend our analysis to predict the type of NRET behavior for the near-field coupling of a chromophore to a range of semiconducting and metallic thin film materials.

引用

页码：2328 / 2333

页数：6

共 46 条

[1] Electronic and optical properties of MoS2-WS2 multi-layers: First principles study [J].