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 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
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
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.
中图分类号: (Photoluminescence, properties and materials)
- 78.55.-m