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Synthesis of ZnO quantum dots and their agglomeration mechanisms along with emission spectra based on ageing time and temperature |
Bo Qiao(乔泊)1,2, Suling Zhao(赵谡玲)1,2, Zheng Xu(徐征)1,2, Xurong Xu(徐叙瑢)1,2 |
1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China; 2. Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044, China |
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Abstract The ZnO quantum dots (QDs) were synthesized with improved chemical solution method. The size of the ZnO QDs is exceedingly uniform with a diameter of approximately 4.8 nm, which are homogeneously dispersed in ethanol. The optical absorption edge shifts from 370 nm of bulk material to 359 nm of QD materials due to the quantum size effect, while the photoluminescence peak shifts from 375 nm to 387 nm with the increase of the density of ZnO QDs. The stability of ZnO QDs was studied with different dispersion degrees at 0 ℃ and at room temperature of 25 ℃. The agglomeration mechanisms and their relationship with the emission spectra were uncovered for the first time. With the ageing of ZnO QDs, the agglomeration is aggravated and the surface defects increase, which leads to the defect emission.
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Received: 20 May 2016
Accepted manuscript online:
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PACS:
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81.07.Bc
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(Nanocrystalline materials)
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78.55.Et
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(II-VI semiconductors)
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Fund: Project supported by the FRFCU (Grant No. 2016JBM066), 863 Program (Grant No. 2013AA032205), the National Natural Science Foundation of China (Grant Nos. 61575019, 51272022, and 11474018), and RFDP (Grant Nos. 20120009130005 and 20130009130001). |
Corresponding Authors:
Bo Qiao
E-mail: boqiao@bjtu.edu.cn
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Cite this article:
Bo Qiao(乔泊), Suling Zhao(赵谡玲), Zheng Xu(徐征), Xurong Xu(徐叙瑢) Synthesis of ZnO quantum dots and their agglomeration mechanisms along with emission spectra based on ageing time and temperature 2016 Chin. Phys. B 25 098102
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[1] |
Qiu Y, Gogna P, Forouhar S, Stintz A and Lester L F 2011 Appl. Phys. Lett. 79 3570
|
[2] |
Geng W D, Guo J, Tang J and Liu H G 2014 Chin. J. Liquid Crystal. Display 29 4 (in Chinese)
|
[3] |
Chen S D, Chen Y Y and Lee S C 2005 Appl. Phys. Lett. 86 253104
|
[4] |
Schoelkopf R J, Wahlgren P, Kozhevnikov A A, Delsing P and Prober D E 1998 Science 280 1238
|
[5] |
Shrestha P K, Chun Y T and Chu D2015 Light-Science & Applications 4
|
[6] |
Dai X, Zhang Z, Jin Y, Niu Y, Cao H, Liang X, Chen L, Wang J and Peng X 2014 Nature 515 96
|
[7] |
Sun Q, Wang Y A, Li L S, Wang D, Zhu T, Xu J, Yang C and Li Y 2007 Nat. Photon. 1 717
|
[8] |
Ning Z, Gong X, Comin R, Walters G, Fan F, Voznyy O, Yassitepe E, Buin A, Hoogland S and Sargent E H 2015 Nature 523 324
|
[9] |
Wu K, Liang G, Shane Q, Ren Y, Kong D and Lian T 2015 JACS 137 12792
|
[10] |
Fonoberov V A and Balandina A A 2004 Appl. Phys. Lett. 85 24
|
[11] |
Tong X L, Xia X Z and Li Q X 2015 Chin. Phys. B 24 6
|
[12] |
Qiao B, Teyssedre G and Laurent C 2015 J. Phys. D: Appl. Phys. 48 405102
|
[13] |
Qiao B, Teyssedre G and Laurent C 2016 J. Appl. Phys. 119 024103
|
[14] |
Moeck P 2005 Nonlinear Analysis - Theory Methods and Applications 63 7
|
[15] |
Moeinian M and Akhbari K J 2015 Solid State Chem. 225 459
|
[16] |
Ai F, Tan J, Li F, Bao L M, Zhong A H and Chen S C 2010 Chin. J. Liquid Crystal. Displays 25 1 (in Chinese)
|
[17] |
Repp S and Erdem E 2016 Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy 152 637
|
[18] |
Ren M F, Wang H, Xu J W and Yang L 2009 Chin. J. Liquid Crystal. Displays 24 1 (in Chinese)
|
[19] |
Liu B, Zhao X R, Feng X X, Liu K and Zhao L 2009 Chin. J. Liquid Crystal. Displays 24 04 (in Chinese)
|
[20] |
Qiao Q, Li B H, Shan C X, Liu J S, Yu J, Xie X H, Zhang Z Z, Ji T B, Jia Y and Shen D Z 2012 Mater. Lett. 74 104
|
[21] |
Son D I, ParkD H, Choi W K, Cho S H, Kim W T and Kim T W 2009 Nanotechnology 20 19
|
[22] |
Qasim K, Chen J, Xu F, Wu J, Li Z, Lei W, Cui Y P and Xia J 2014 Sci Adv Mater. 6 2625
|
[23] |
Aleshin A N, Shcherbakov I P and Petrov V N 2015 Solid State Commun. 208 41
|
[24] |
Maikhuri D, Purohit S P and Mathur K C 2015 Superlatt. Microstruct. 85 206
|
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