Negative capacitance in doped bi-layer organic light-emitting devices

Nuo Li, Xin Dong Gao, Zuo Ti Xie, Zheng Yi Sun, Xun Min Ding, Xiao Yuan Hou*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


This paper reports that the doped bi-layer organic light-emitting devices are fabricated by doping in different regions of the light-emitting layer, the admittance and luminance spectra to characterize the capacitance and luminance of the device are measured. Negative capacitance (NC) appeared at low frequencies when the doped devices are biased with high voltages. The measured phase difference between AC voltage applied across the device and AC current flowing through the device show that the device is inductive when NC appears.

Original languageEnglish
Article number027306
JournalChinese Physics B
Issue number2
StatePublished - Feb 2011
Externally publishedYes


  • doping in different regions
  • negative capacitance
  • organic light-emitting device


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