| SPECIAL TOPIC—60th Anniversary of Department of Physics of Nanjing Normal University |
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Increase of photoluminescence blinking frequency of 3C-SiC nanocrystals with excitation power |
| Zhixing Gan(甘志星)1, Weiping Zhou(周卫平)2, Ming Meng(孟明)3 |
1 Center for Quantum Transport and Thermal Energy Science, Key Laboratory of Optoelectronic Technology of Jiangsu Province, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China;
2 School of Science, Nanjing University of Science and Technology, Nanjing 210094, China;
3 School of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466001, China |
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Abstract Super-resolution optical fluctuation imaging is dependent on the blinking frequency of fluorophores. Consequently, improvement of the photoluminescence (PL) blink frequency is important. This is achieved for 3C-SiC nanocrystals (NCs) by simply increasing the excitation power. Using an excitation of 488 nm with powers of 5 μW to 50 μW, individual 3C-SiC NC always exhibits PL blinking with a short on-state sojourn time (<0.1 s). A fast Fourier transform method is exploited to determine the PL switching frequency. It is found that the frequency of the bright state increases from 2 Hz to 20 Hz as the excitation power increases from 5 μW to 50 μW, which is explained by the Auger photonionization model.
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Received: 19 August 2018
Revised: 12 September 2018
Accepted manuscript online:
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PACS:
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78.55.-m
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(Photoluminescence, properties and materials)
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32.80.-t
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(Photoionization and excitation)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11604155, 11604147, and 51702379), China Postdoctoral Science Foundation (Grant Nos. 2016M600428 and 2017T100386), and the Planned Projects for Postdoctoral Research Funds of China (Grant No. 1601023A). |
Corresponding Authors:
Zhixing Gan
E-mail: zxgan@njnu.edu.cn
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Cite this article:
Zhixing Gan(甘志星), Weiping Zhou(周卫平), Ming Meng(孟明) Increase of photoluminescence blinking frequency of 3C-SiC nanocrystals with excitation power 2018 Chin. Phys. B 27 127804
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