Colloidal Semiconductor Quantum Dots with Tunable Surface Composition

被引：202
作者：
Wei, Helen Hisiu-Ying [1 ]
Evans, Christopher M. [1 ]
Swartz, Brett D. [1 ]
Neukirch, Amanda J. [2 ]
Young, Jeremy [2 ]
Prezhdo, Oleg V. [1 ,2 ]
Krauss, Todd D. [1 ,3 ]
机构：
[1] Univ Rochester, Dept Chem, Rochester, NY 14627 USA
[2] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA
[3] Univ Rochester, Inst Opt, Rochester, NY 14627 USA
来源：
NANO LETTERS | 2012年 / 12卷 / 09期
基金：
美国国家科学基金会;
关键词：
Semiconductor nanocrystals; photoluminescence; synthesis; surface composition; nonradiative relaxation; CDSE NANOCRYSTALS; LUMINESCENCE; MONODISPERSE; CORE; HYDROPHOSPHINATION; SPECTROSCOPY; ENERGY; CDTE; SE;
D O I：
10.1021/nl3012962
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Colloidal CdS quantum dots (QDs) were synthesized with tunable surface composition. Surface stoichiometry was controlled by applying reactive secondary phosphine sulfide precursors in a layer-by-layer approach. The surface composition was observed to greatly affect photoluminescence properties. Band edge emission was quenched in sulfur terminated CdS QDs and fully recovered when QDs were cadmium terminated. Calculations suggest that electronic states inside the band gap arising from surface sulfur atoms could trap charges, thus inhibiting radiative recombination and facilitating nonradiative relaxation.
引用
收藏
页码：4465 / 4471
页数：7
相关论文
共 39 条
  • [1] Semiconductor clusters, nanocrystals, and quantum dots
    Alivisatos, AP
    [J]. SCIENCE, 1996, 271 (5251) : 933 - 937
  • [2] Ultrafast charge separation at CdS quantum dot/rhodamine B molecule interface
    Boulesbaa, Abdelaziz
    Issac, Abey
    Stockwell, Dave
    Huang, Zhuangqun
    Huang, Jier
    Guo, Jianchang
    Lian, Tianquan
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (49) : 15132 - +
  • [3] Quenching of CdSe-ZnS core-shell quantum dot luminescence by water-soluble thiolated ligands
    Breus, Vladimir V.
    Heyes, Colin D.
    Nienhaus, G. Ulrich
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (50) : 18589 - 18594
  • [4] Semiconductor nanocrystals as fluorescent biological labels
    Bruchez, M
    Moronne, M
    Gin, P
    Weiss, S
    Alivisatos, AP
    [J]. SCIENCE, 1998, 281 (5385) : 2013 - 2016
  • [5] Electroluminescence from single monolayers of nanocrystals in molecular organic devices
    Coe, S
    Woo, WK
    Bawendi, M
    Bulovic, V
    [J]. NATURE, 2002, 420 (6917) : 800 - 803
  • [6] Mysteries of TOPSe Revealed: Insights into Quantum Dot Nucleation
    Evans, Christopher M.
    Evans, Meagan E.
    Krauss, Todd D.
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (32) : 10973 - 10975
  • [7] Frisch M. J., 2016, Gaussian 03 Revision B.03
  • [8] Photoinduced electron transfer from conjugated polymers to CdSe nanocrystals
    Ginger, DS
    Greenham, NC
    [J]. PHYSICAL REVIEW B, 1999, 59 (16) : 10622 - 10629
  • [9] Nonradiative quenching of fluorescence in a semiconducting carbon nanotube:: A time-domain ab initio study
    Habenicht, Bradley F.
    Prezhdo, Oleg V.
    [J]. PHYSICAL REVIEW LETTERS, 2008, 100 (19)
  • [10] From Cd-rich to Se-rich - The manipulation of CdSe nanocrystal surface stoichiometry
    Jasieniak, Jacek
    Mulvaney, Paul
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (10) : 2841 - 2848
1234