|
|
Article: Recent findings from B.A. Gregg and co-authors highlight research in physical chemistry.
- Article from:
- Chemicals & Chemistry
- Article date:
- May 22, 2009
CopyrightCOPYRIGHT 2009 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
According to recent research published in the Journal of Physical Chemistry C, "Some models of charge transport in pi-conjugated polymers treat these materials as if they were electrical insulators. Although this may be appropriate for a few materials, many polymers are effectively doped p-type by a high density of charged defects."
"Herein, limits are estimated for the charged defect density above which the resulting electrostatic fluctuations may govern transport and for the corresponding free hole density above which space-charge-limited currents should not occur. These limits are lower than the experimentally observed values in many pi-conjugated polymers, ...