Exciton Binding Energy in small organic conjugated molecule

TL;DR

This paper presents a simple formula for calculating exciton binding energy in small organic conjugated molecules, accounting for shape deviations with a correction factor.

Contribution

It introduces a straightforward relation for exciton binding energy and discusses minor corrections for non-spherical molecules.

Findings

The formula BE d7 e2/(4cb5}0b5 R) effectively estimates binding energy.

Shape deviations require only minor correction factors.

The approach simplifies exciton energy calculations in organic molecules.

Abstract

For small organic conjugated molecules the exciton binding energy can be calculated treating molecules as conductor, and is given by a simple relation BE \approx e2/(4{\pi}{\epsilon}0{\epsilon}R), where {\epsilon} is the dielectric constant and R is the equivalent radius of the molecule. However, if the molecule deviates from spherical shape, a minor correction factor should be added.