Designable Luminescence with Quantum Dot-Silver Plasmon Coupler

被引:18
作者
Hu, Lian [1 ,2 ]
Wu, Huizhen [1 ,2 ]
Zhang, Bingpo [1 ,2 ]
Du, Lingxiao [1 ,2 ]
Xu, Tianning [3 ]
Chen, Yongyue [1 ,2 ]
Zhang, Yong [4 ]
机构
[1] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
[3] Zhejiang Univ Technol, Coll Sci, Hangzhou 310024, Zhejiang, Peoples R China
[4] Univ N Carolina, Dept Elect & Comp Engn, Optoelect Ctr, Charlotte, NC 28223 USA
关键词
CADMIUM SELENIDE NANOCRYSTALS; WHITE-LIGHT EMISSION; CDSE NANOCRYSTALS; OPTICAL-PROPERTIES; ENHANCED FLUORESCENCE; EXCITON DYNAMICS; GROWTH-KINETICS; PARTICLE-SIZE; SURFACE; STATE;
D O I
10.1002/smll.201400094
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We explore a strongly interacting QDs/Ag plasmonic coupling structure that enables multiple approaches to manipulate light emission from QDs. Group II-VI semiconductor QDs with unique surface states (SSs) impressively modify the plasmonic character of the contiguous Ag nanostructures whereby the localized plasmons (LPs) in the Ag nanostructures can effectively extract the non-radiative SSs of the QDs to radiatively emit via SS-LP resonance. The SS-LP coupling is demonstrated to be readily tunable through surface-state engineering both during QD synthesis and in the post-synthesis stage. The combination of surface-state engineering and band-tailoring engineering allows us to precisely control the luminescence color of the QDs and enables the realization of white-light emission with single-size QDs. Being a versatile metal, the Ag in our optical device functions in multiple ways: as a support for the LPs, for optical reflection, and for electrical conduction. Two application examples of the QDs/Ag plasmon coupler for optical devices are given, an Ag microcavity + plasmon-coupling structure and a new QD light-emitting diode. The new QDs/Ag plasmon coupler opens exciting possibilities in developing novel light sources and biomarker detectors.
引用
收藏
页码:3099 / 3109
页数:11
相关论文
共 46 条
[1]   Gram-Scale One-Pot Synthesis of Highly Luminescent Blue Emitting Cd1-xZnxS/ZnS Nanocrystals [J].
Bae, Wan Ki ;
Nam, Min Ki ;
Char, Kookheon ;
Lee, Seonghoon .
CHEMISTRY OF MATERIALS, 2008, 20 (16) :5307-5313
[2]   Alloyed semiconductor quantum dots: Tuning the optical properties without changing the particle size [J].
Bailey, RE ;
Nie, SM .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (23) :7100-7106
[3]   Tuning the Emission of CdSe Quantum Dots by Controlled Trap Enhancement [J].
Baker, David R. ;
Kamat, Prashant V. .
LANGMUIR, 2010, 26 (13) :11272-11276
[4]   Spontaneous emission properties of color centers based optical microcavities [J].
Belarouci, A ;
Menchini, F ;
Rigneault, H ;
Jacquier, B ;
Montereali, RM ;
Somma, F ;
Moretti, P .
OPTICS COMMUNICATIONS, 2001, 189 (4-6) :281-287
[5]   White-light emission from magic-sized cadmium selenide nanocrystals [J].
Bowers, MJ ;
McBride, JR ;
Rosenthal, SJ .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (44) :15378-15379
[7]   Nucleation and growth kinetics of CdSe nanocrystals in octadecene [J].
Bullen, CR ;
Mulvaney, P .
NANO LETTERS, 2004, 4 (12) :2303-2307
[8]   Tailored Plasmonic Gratings for Enhanced Fluorescence Detection and Microscopic Imaging [J].
Cui, Xiaoqiang ;
Tawa, Keiko ;
Hori, Hironobu ;
Nishii, Junji .
ADVANCED FUNCTIONAL MATERIALS, 2010, 20 (04) :546-553
[9]   Transport properties of annealed CdSe colloidal nanocrystal solids [J].
Drndic, M ;
Jarosz, MV ;
Morgan, NY ;
Kastner, MA ;
Bawendi, MG .
JOURNAL OF APPLIED PHYSICS, 2002, 92 (12) :7498-7503
[10]   Single-Nanocrystal Spectroscopy of White-Light-Emitting CdSe Nanocrystals [J].
Dukes, Albert D., III ;
Samson, Philip C. ;
Keene, Joseph D. ;
Davis, Lloyd M. ;
Wikswo, John P. ;
Rosenthal, Sandra J. .
JOURNAL OF PHYSICAL CHEMISTRY A, 2011, 115 (16) :4076-4081