Search

Article

x

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

Negative capacitance in polymer light-emitting diodes

Huang Wen-Bo Zeng Wen-Jin Wang Li Peng Jun-Biao

Citation:

Negative capacitance in polymer light-emitting diodes

Huang Wen-Bo, Zeng Wen-Jin, Wang Li, Peng Jun-Biao
PDF
Get Citation

(PLEASE TRANSLATE TO ENGLISH

BY GOOGLE TRANSLATE IF NEEDED.)

  • A.c. electrical properties of the heterostructured polymer light-emitting diode consisting of poly[2-methoxy-5-(2′-ethyl-hexyloxy)- 1, 4-phenylenevinylene](MEH-PPV) as the light-emitting layer, and poly[(9,9 - bis(3′-(N,N-dimethylamino) propyl)-2,7- fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PF-NR2) as the electron-injecting layer, are studied by using impedance spectroscopy. Negative capacitance in impedance spectroscopic data has been observed. According to the Cole-Cole plot of the device ITO/PEDOT/MEH-PPV/PF-NR2/Al, the a.c. response of MEH-PPV/PF-NR2 interface can be explained in terms of the equivalent circuit model of a parallel combination of an inductance L and a resistance RL. The experiments showed that PF-NR2 could act as an electron injecting and hole blocking layer. We propose an energy band structure schematic diagram to explain the enhancement of the EL efficiency in the ITO/PEDOT/MEH-PPV/PF-NR2/Al structure.
Metrics
  • Abstract views:  7946
  • PDF Downloads:  1309
  • Cited By: 0
Publishing process
  • Received Date:  24 October 2007
  • Accepted Date:  03 March 2008
  • Published Online:  20 September 2008

/

返回文章
返回