title: Time-dependent density-functional calculations of S0-S1 transition energies of poly(p-phenylene vinylene).
abstract: We used time-dependent density-functional-theory (TDDFT) approaches to calculate absorption (S(0)-->S(1)) and emission (S(1)-->S(0)) transition energies of poly(p-phenylene vinylene) (PPV). The absorption and emission energies were estimated to be 2.44 and 2.16 eV, respectively, from the extrapolation of calculated results for oligomers. Comparisons with available experimental data demonstrated that TDDFT is a very reliable tool for investigating the electronic transitions of PPV.
authors.affiliation: Computational Chemistry Laboratory, Corporate R&D, LG Chem, Ltd. Research Park, Daejeon, 305-380, South Korea. ykhan@lgchem.com
authors.forename: Young-Kyu
authors.initials: YK
authors.lastname: Han
authors.forename: Sang Uck
authors.initials: SU
authors.lastname: Lee