Abstract
A poly-p-phenylenevinylene (PPV)-based light-emitting diode (LED) device was studied by means of comprehensive ac impedance measurements. Separate regions of frequency-dependent responses, the bulk and depleted (interface) regions, with distinct electrical properties, were identified and characterized. The ac J-E characteristics revealed the space-charge limited conduction mechanism, which was specifically assigned to the depleted region. Besides, a direct estimate of the trap density in the bulk region was obtained from the applied voltage dependence of the charge concentration.
Original language | English |
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Pages (from-to) | 143-146 |
Number of pages | 4 |
Journal | Solid State Communications |
Volume | 128 |
Issue number | 4 |
DOIs | |
State | Published - Oct 2003 |
Keywords
- A. Polymers, elastomers, and plastics
- D. Dielectric response
- D. Electronic transport