Excitons in poly([ital para]-phenylenevinylene)

Journal Article · Tue Nov 15 04:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.14702· OSTI ID:6892559

Chandross, M ^[1]; Mazumdar, S ^[2]; Jeglinski, S; Wei, X; Vardeny, Z V ^[3]; Kwock, E W; Miller, T M ^[4]

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1. Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States)
2. Department of Physics and The Optical Sciences Center, University of Arizona, Tucson, Arizona 85721 (United States)
3. Department of Physics, University of Utah, Salt Lake City, Utah 84112 (United States)
4. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)

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[plus minus]0.15 eV. Measurements of the photoconductivity quantum efficiency in poly[2-methoxy,5-(2[sup [prime]]-ethyl-hexyloxy)-1,4 phenylenevinylene] reveal a binding energy in good agreement with the theoretical value.

• DOE Contract Number: FG03-93ER45490
• OSTI ID: 6892559
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:19; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
ABSORPTION SPECTRA
ALKYL RADICALS
BINDING ENERGY
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
EXCITONS
LUMINESCENCE
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHENYLENE RADICALS
PHOTOCONDUCTIVITY
PHOTOLUMINESCENCE
PHYSICAL PROPERTIES
POLYMERS
QUANTUM EFFICIENCY
QUASI PARTICLES
RADICALS
SPECTRA
VINYL RADICALS