[1] Univ Fed Parana, Dept Fis, Grp Organ Optoelect Devices, BR-81531990 Curitiba, PR, Brazil
[2] Univ Fed Parana, Dept Quim, BR-81531990 Curitiba, PR, Brazil
[3] Chinese Acad Sci, Changchun Inst Appl Chem, Grad Sch, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China