Excitons and biexcitons in poly(para-phenylenevinylene)

M. Chandross; F. Guo; S. Mazumdar

doi:10.1016/0379-6779(94)02595-P

Excitons and biexcitons in poly(para-phenylenevinylene)

M. Chandross, F. Guo, S. Mazumdar

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The Hückel model fails to describe optical absorption in PPV and its derivatives, and explicit inclusion of moderate electron-electron interactions is essential for a proper theoretical description. The lowest optical state is an exciton with a binding energy estimated as 0.90 ± 0.15 eV, in excellent agreement with experiment. Such a large exciton binding energy strongly suggests stable biexcitons. The concept of biexcitons in π-conjugated polymers is introduced, and picosecond photoinduced absorption is explained as excited state absorption from the exciton to the biexciton.

Original language	English (US)
Pages (from-to)	625-628
Number of pages	4
Journal	Synthetic Metals
Volume	69
Issue number	1-3
DOIs	https://doi.org/10.1016/0379-6779(94)02595-P
State	Published - Mar 1 1995

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/0379-6779(94)02595-P

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title = "Excitons and biexcitons in poly(para-phenylenevinylene)",

abstract = "The H{\"u}ckel model fails to describe optical absorption in PPV and its derivatives, and explicit inclusion of moderate electron-electron interactions is essential for a proper theoretical description. The lowest optical state is an exciton with a binding energy estimated as 0.90 ± 0.15 eV, in excellent agreement with experiment. Such a large exciton binding energy strongly suggests stable biexcitons. The concept of biexcitons in π-conjugated polymers is introduced, and picosecond photoinduced absorption is explained as excited state absorption from the exciton to the biexciton.",

author = "M. Chandross and F. Guo and S. Mazumdar",

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AU - Chandross, M.

AU - Guo, F.

AU - Mazumdar, S.

PY - 1995/3/1

Y1 - 1995/3/1

N2 - The Hückel model fails to describe optical absorption in PPV and its derivatives, and explicit inclusion of moderate electron-electron interactions is essential for a proper theoretical description. The lowest optical state is an exciton with a binding energy estimated as 0.90 ± 0.15 eV, in excellent agreement with experiment. Such a large exciton binding energy strongly suggests stable biexcitons. The concept of biexcitons in π-conjugated polymers is introduced, and picosecond photoinduced absorption is explained as excited state absorption from the exciton to the biexciton.

AB - The Hückel model fails to describe optical absorption in PPV and its derivatives, and explicit inclusion of moderate electron-electron interactions is essential for a proper theoretical description. The lowest optical state is an exciton with a binding energy estimated as 0.90 ± 0.15 eV, in excellent agreement with experiment. Such a large exciton binding energy strongly suggests stable biexcitons. The concept of biexcitons in π-conjugated polymers is introduced, and picosecond photoinduced absorption is explained as excited state absorption from the exciton to the biexciton.

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JO - Synthetic Metals

JF - Synthetic Metals

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ER -

Excitons and biexcitons in poly(para-phenylenevinylene)

Abstract

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