Abstract
We show that one-electron band theory fails to describe optical absorption in PPV and the absorption spectrum can be described only within a Coulomb-correlated model. The lowest optical state is an exciton, whose binding energy is estimated theoretically to be 0.90±0.15 eV. Measurements of the photoconductivity quantum efficiency in poly[2-methoxy,5-(2'-ethyl-hexyloxy)-1, 4 phenylenevinylene] reveal a binding energy in good agreement with the theoretical value.
Original language | English (US) |
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Pages (from-to) | 14702-14705 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 50 |
Issue number | 19 |
DOIs | |
State | Published - 1994 |
ASJC Scopus subject areas
- Condensed Matter Physics