Advertisement

Optoelectronics Letters

, Volume 1, Issue 2, pp 124–126 | Cite as

Experimental study of negative capacitance in LEDs

  • Feng Lie-feng 
  • Wang Jun 
  • Zhu Chuan-yun 
  • Cong Hong-xia 
  • Chen Yong 
  • Wang Cun-da 
Devices and Applications

Abstract

The experimental study on negative capacitance (NC) of various light-emitting diodes (LEDs) is presented. Experimental result shows that all LEDs display the NC phenomenon. The voltage modulated electroluminescence (VMEL) experiment confirms that the reason of negative capacitance is the strong recombination of the injected carriers in the active region of luminescence. The measures also verify that the dependence of NC on voltage and frequency in different LEDs is similar; NC phenomenon is more obvious with higher voltage or lower frequency.

CLC number

TN312+. 8 

Document code

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    MENG Ji-wu, WANG Yan-xin, and WANG Jing,J. of Optoelectronics · Laser,14 (2003), 566, (in Chinese)Google Scholar
  2. [2]
    Wang Cunda, Zeng Zhibin, and Zhang Guoyi,Chinese Journal of Semiconductors,24, (2003), 1307. (in Chinese)Google Scholar
  3. [3]
    C. D. Wang, C. Y. Zhu, and G. Y. Zhang,IEEE Trans Electron Devices,50 (2003), 1145.CrossRefADSGoogle Scholar
  4. [4]
    Henry Kressel and J K Buther, Semiconductor lasers and heterojunction LEDs.Academic Press, 1977, Chap. 2.Google Scholar
  5. [5]
    ZHENG Zhi-bin, ZHU Chuan-yun, and LI Le,J of Optoelectronics · Laser,15 (2004), 402, (in Chinese)Google Scholar
  6. [6]
    Jian-Guo Ma, Kiat Seng Yeo, and Manh Do.IEEE Trans Electron Devices,46, (1999), 2357.CrossRefGoogle Scholar
  7. [7]
    A. F. J. Levi, R. T. Tung, and M. Anziowar.Phys. Rev. Lett,60 (1987), 53.Google Scholar
  8. [8]
    X. Wu, H. L. Ebans, and E. S. Yang,J Appl Phys. 68 (1990), 2845.CrossRefADSGoogle Scholar

Copyright information

© Tianjin University of Technology 2005

Authors and Affiliations

  • Feng Lie-feng 
    • 1
  • Wang Jun 
    • 1
  • Zhu Chuan-yun 
    • 2
  • Cong Hong-xia 
    • 1
  • Chen Yong 
    • 1
  • Wang Cun-da 
    • 1
  1. 1.Department of Applied PhysicsTianjin UniversityTianjinChina
  2. 2.Department of Photoelectronics & PhysicsFoshan UniversityFoshan, GuangdongChina

Personalised recommendations