The photoinduced absorption of cis-(CH)x has been investigated by nanosecond time-resolved spectroscopy. Photoinduced absorption at 1.55 eV and bleaching of the interband transition at 2.05 eV are observed. The photoinduced absorbance change decays as exp[-(t/)1/2] with =2.30.2 s at 80 K. The photoinduced absorption is considered to be due to exciton bipolarons or polarons. The decay kinetics is interpreted by the trapping model, i.e., an excited species disappears at traps after a one-dimensional random walk.
ASJC Scopus subject areas
- Condensed Matter Physics