Excitons in poly(para-phenylenevinylene)
作者： M. Chandross , S. Mazumdar , S. Jeglinski , X. Wei , Z. V. Vardeny
DOI: 10.1103/PHYSREVB.50.14702
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摘要: We show that one-electron band theory fails to describe optical absorption in PPV and the spectrum can be described only within a Coulomb-correlated model. The lowest state is an exciton, whose binding energy estimated theoretically 0.90\ifmmode\pm\else\textpm\fi{}0.15 eV. Measurements of photoconductivity quantum efficiency poly[2-methoxy,5-(${2}^{\mathcal{'}}$-ethyl-hexyloxy)-1,4 phenylenevinylene] reveal good agreement with theoretical value.
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