中国物理B ›› 2018, Vol. 27 ›› Issue (12): 127804-127804.doi: 10.1088/1674-1056/27/12/127804

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Increase of photoluminescence blinking frequency of 3C-SiC nanocrystals with excitation power

Zhixing Gan(甘志星), Weiping Zhou(周卫平), Ming Meng(孟明)   

  1. 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
  • 收稿日期:2018-08-19 修回日期:2018-09-12 出版日期:2018-12-05 发布日期:2018-12-05
  • 通讯作者: Zhixing Gan E-mail:zxgan@njnu.edu.cn
  • 基金资助:

    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).

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. 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
  • Received:2018-08-19 Revised:2018-09-12 Online:2018-12-05 Published:2018-12-05
  • Contact: Zhixing Gan E-mail:zxgan@njnu.edu.cn
  • Supported by:

    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).

摘要:

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.

关键词: photoluminescence, nanocrystals, blinking, Auger photonionization

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.

Key words: photoluminescence, nanocrystals, blinking, Auger photonionization

中图分类号:  (Photoluminescence, properties and materials)

  • 78.55.-m
32.80.-t (Photoionization and excitation)