We demonstrate that the transient photoconductivity, photoluminescence, and excited-state absorption (PA) in single-crystal α-octithiophene (8T) are radically different from those in 8T-oriented polycrystalline film. These observations suggest that structural disorder in the 8T system introduces sub-band-gap energy levels that reduce the photocurrent lifetime, facilitate radiative transitions in the near-IR region, and enhance PA.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 1999|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics