We have studied photoluminescence (PL) of dialkoxy phenylene vinylene homopolymer (P(MHPV)) and its copolymers with phenothiazine derivative (P(MHPV-co-HPhz) and P(HPV-co-HPhz)) under 488-nm laser irradiation. In P(MHPV) films, the PL intensity is observed to increase as the sample temperature is decreased, which is in strong contrast with P(HPV-co-HPhz) films. While the PL intensity of P(HPV-co-HPhz) shows an increase with cooling down to 150 K, it shows a small decrement below that temperature, The PL spectra of P(MHPV) are blueshifted with increasing temperature while those of P(HPV-co-HPhz) are almost independent of the sample temperature. The PL properties of P(MHPV-co-HPhz) are quite similar to those of P(HPV-co-HPhz). The PL peak positions of the three polymers are linearly correlated with the band gap energy measured by ellipsometry. It is proposed that these phenomena are due to the temperature dependence of the structural variation of PPV derivatives based on possible mechanisms.
|Number of pages||4|
|Journal||Journal of the Korean Physical Society|
|Publication status||Published - 2004 Apr 1|
- Phenylene vinylene polymer
- Temperature effects
ASJC Scopus subject areas
- Physics and Astronomy(all)