Vibrational Neutron Spectroscopy Data for Small Molecule Organic Semiconductors

Organic semiconductors are a class of molecules that self-assemble into
materials that have semiconducting properties. Recently,
they have generated a large amount of research interest due to
their solution processability, mechanical flexibility, and conducting
properties. Small molecule organic semiconductors are highly crystalline,
which means molecular vibrations/phonons are the dominant
factors affecting charge transport properties. A key to
improving small-molecule semiconductors involves designing materials that
minimize the effects of vibrations/phonons on charge
transport. Vibrational neutron spectroscopy is a method for
characterizing molecular vibrations and phonon modes over a wide energy
range (1 meV - 1 eV). Each of the peaks represent the frequency of the
motion of hydrogens present in the material. The data was collected at 5
K. Here we present vibrational neutron spectroscopy data for the small
molecule organic semiconductors: BTBT, c8-BTBT, m8-BTBT, TIPS-pentacene,
TIPS-ADT, and TES-ADT. This data can be used to accurately find the
vibrational modes affecting charge transport.