Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9586269 | Journal of Luminescence | 2005 | 7 Pages |
Abstract
The pressure effect on photoluminescence (PL) and Raman spectra of the poly (para-phenylene vinylene) (PPV) has been investigated with a diamond anvil cell (DAC) under the hydrostatic pressure condition. The intensity ratios, I1167/I1622 and I1543/I1622, increase with pressure. This indicates that the conjugated length of PPV is enhanced at high pressures. In addition, appearance of a new Raman band corresponding to CC stretch at 1190Â cmâ1 shows that the chain conformation defects decreased with increasing pressure. The redshift of the PL spectra and shift to higher frequencies for Raman bands with increase in pressure are explained by combining the conjugation model with amplitude mode model.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Q.G. Zeng, Z.J. Ding, X.D. Tang, Z.M. Zhang,