Abstract
We report the effects of blending poly[2-methoxy-5-(2′-ethyl- hexyloxy)-p-phenylene-vinylene] (MEH-PPV) conjugate polymers with single-walled carbon nanotubes (SWNTs). The blend ratio of MEH-PPV/SWNT composites for polymer light-emitting diodes (PLEDs) ranged from 0 wt% to 1 wt% SWNTs. From time-of-flight (TOF) measurements, the electron mobility was observed to increase gradually with the weight percent of SWNTs while the hole mobility remained almost unchanged. According to the Poole-Frenkel model, an increase in the weight percent of SWNTs lowers the zero-field activation energy, suggesting that SWNTs effectively reduce the oxygen trap density. At a 0.2-wt% SWNTs concentration, the electron and the hole mobilities could be tuned for the highest external quantum efficiency.
| Original language | English |
|---|---|
| Pages (from-to) | 146-149 |
| Number of pages | 4 |
| Journal | Journal of the Korean Physical Society |
| Volume | 48 |
| Issue number | 1 |
| Publication status | Published - 2006 Jan |
Keywords
- MEH-PPV polymer
- Polymer light-emitting diode
- Single-walled carbon nanotube
- Time-of-flight measurement
ASJC Scopus subject areas
- Physics and Astronomy(all)