The interaction of poly (p-phenylenevinylene) with air (pages 971–974)
Dr. Kezhao Xing, Dr. Mats Fahlman, Dr. Michael Lögdlund, Dr. Doni A. dos Santos, Dr. Vincent Parenté, Dr. Roberto Lazzaroni, Prof. Jean-Luc Brédas, Dr. Richard W. Gymer and William R. Salaneck
Article first published online: 29 OCT 2004 | DOI: 10.1002/adma.19960081204
The exposure of poly(p-phenylenevinylene), PPV, to air affects its performance in polymer-based light-emitting devices. An investigation is described in which exposure to air is demonstrated to give rise to reversible affects associated with the absorption of water vapor, leading to determinal changes in the outer electronic structure (see also the cover of this issue). In particular the resulting increase in torsion angle is shown to lead to a reduction in conjugation. A method of preparing clean PPV films is proposed.