الفهرس | Only 14 pages are availabe for public view |
Abstract Chemical and physical defects at the metal/polymer heterostructures play a vital role in the charge injection process at the metal/polymer interface. The present work studies the effect of polyethylene chain deformation and copper surface oxidation on the barriers to charge injection at the Cu(111)/PE(001) interface. The chain deformation in polyethylene is represented by lamella structure, in addition, copper surface oxidation appears using oxygen adatom impurities. The electronic properties of these structures are studied using density functional theory as a computational quantum mechanical method. The computations concluded that lamella and oxygen adatom defects produce the deepest trap states for holes (0.6 eV) and electrons (0.77 eV), respectively. Additionally, this work winds up that the studied defects cannot explain alone the barrier to injection of 1 eV at the copper/polyethylene interfaces. |