Shell layer dependence of photoblinking in CdSe/ZnSe/ZnS quantum dots

被引：22
|
作者：
Isnaeni [1 ,2 ]
Kim, Kyoo H. [1 ,2 ]
Nguyen, Dinh L. [3 ]
Lim, Hanjo [3 ]
Pham Thu Nga [4 ]
Cho, Yong-Hoon [1 ,2 ]
机构：
[1] Korea Adv Inst Sci & Technol, Grad Sch Nanosci & Technol WCU, Dept Phys, Taejon 305701, South Korea
[2] Korea Adv Inst Sci & Technol, KI NanoCentury, Taejon 305701, South Korea
[3] Ajou Univ, Dept Elect & Comp Engn, Suwon 443749, South Korea
[4] Vietnam Acad Sci & Technol, Inst Mat Sci, Hanoi 10000, Vietnam
来源：
APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 01期
关键词：
SEMICONDUCTOR NANOCRYSTALS; BLINKING; RECOMBINATION; INTERMITTENCY; ENVIRONMENT; EMISSION; EMITTERS;
D O I：
10.1063/1.3533401
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on the influence of shell addition, shell thickness, and shape of CdSe/ZnSe/ZnS colloidal quantum dots (QDs) on luminescence, decay lifetime, and photoblinking. The addition of shell layers appreciably increased (decreased) the time interval of on (off) time, while the increase of outer shell thickness only increases the time interval of on-time. The photoblinking was suppressed as the QD shape changes from spherical to ellipsoidal probably due to the reduction of Auger process as the wave function degeneracy of the identical states of the two holes is lifted. We also suggest that interface traps might enhance the Auger recombination. (C) 2011 American Institute of Physics. [doi:10.1063/1.3533401]
引用
收藏
页数：3
相关论文
共 50 条
  • [11] Characterization of shell material on colloidal CdSe/ZnS quantum dots
    Yu, ZH
    Guo, L
    Du, H
    Krauss, T
    Silcox, J
    NANOPARTICLES AND NANOWIRE BUILDING BLOCKS-SYNTHESIS, PROCESSING, CHARACTERIZATION AND THEORY, 2004, 818 : 177 - 182
  • [12] Excellent stability of thicker shell CdSe@ZnS/ZnS quantum dots
    Fu, Yan
    Kim, Daekyoung
    Jiang, Wei
    Yin, Wenping
    Ahn, Tae Kyu
    Chae, Heeyeop
    RSC ADVANCES, 2017, 7 (65): : 40866 - 40872
  • [13] Tunable electrochemiluminescence of CdSe@ZnSe quantum dots by adjusting ZnSe shell thickness
    Ding, Shou-Nian
    Jin, Yan
    Chen, Xi
    Bao, Ning
    ELECTROCHEMISTRY COMMUNICATIONS, 2015, 55 : 30 - 33
  • [14] Photostability and pH sensitivity of CdSe/ZnSe/ZnS quantum dots in living cells
    Sun, Y. H.
    Liu, Y. S.
    Vernier, P. T.
    Liang, C. H.
    Chong, S. Y.
    Marcu, L.
    Gundersen, M. A.
    NANOTECHNOLOGY, 2006, 17 (17) : 4469 - 4476
  • [15] Effect of ZnS shell on optical properties of CdSe-ZnS core-shell quantum dots
    Mathew, S.
    Bhardwaj, Bishwajeet Singh
    Saran, Amit D.
    Radhakrishnan, P.
    Nampoori, V. P. N.
    Vallabhan, C. P. G.
    Bellare, Jayesh R.
    OPTICAL MATERIALS, 2015, 39 : 46 - 51
  • [16] Thick-Shell CdSe/ZnS/CdZnS/ZnS Core/Shell Quantum Dots for Quantitative Immunoassays
    Lv, Yanbing
    Yuan, Yucheng
    Hu, Ning
    Jin, Na
    Xu, Dangdang
    Wu, Ruili
    Shen, Huaibin
    Chen, Ou
    Li, Lin Song
    ACS APPLIED NANO MATERIALS, 2021, 4 (03) : 2855 - 2865
  • [17] The shell thickness and surface passivation dependence of fluorescence decay kinetics in CdSe/ZnS core-shell and CdSe core colloidal quantum dots
    Rajapaksha, Ruwini D.
    Ranasinghe, Mahinda I.
    JOURNAL OF LUMINESCENCE, 2017, 192 : 860 - 866
  • [18] CdSe/ZnS core/shell quantum dots for bio-application
    Dai, N
    Chen, J
    ICO20: MATERIALS AND NANOSTRUCTURES, 2006, 6029
  • [19] Photoluminescence of bioconjugated core-shell CdSe/ZnS quantum dots
    Torchynska, T. V.
    Douda, J.
    Calva, P. A.
    Ostapenko, S. S.
    Pena Sierra, R.
    JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2009, 27 (02): : 836 - 838
  • [20] CdSe/ZnS/CdS core/shell quantum dots for white LEDs
    Shen Changyu
    PHOTONICS, DEVICES, AND SYSTEMS IV, 2008, 7138
12345