Author/Authors :
Gontia، نويسنده , , I and Frolov، نويسنده , , S.V and Liess، نويسنده , , M and Vardeny، نويسنده , , Z.V. and Ehrenfreund، نويسنده , , E and Tada، نويسنده , , K and Kajii، نويسنده , , H and Hidayat، نويسنده , , R and Fujii، نويسنده , , A and Yoshino، نويسنده , , K and Teraguchi، نويسنده , , M and Masuda، نويسنده , , T، نويسنده ,
Abstract :
We studied the photoexcitations in films of disubstituted polyacetylene, a π-conjugated polymer with degenerate ground state. We found that the polymer in its pristine form supports charged and neutral topological soliton excitations. Photo-oxidized films or polymer/C60 blends show, in addition, polaron excitations. At the same time the polymers show a strong emission band with high quantum efficiency, which leads to stimulated emission in thin films and lasing in cylindrical μ-cavities. These excitation properties are unique among polymers of both degenerate and non-degenerate ground state.
Keywords :
Solitons , Di-substituted polymers , Potoexcitations , Photogeneration , IRAV , Polarons
