Electron Transporting Molecular Glasses Based on Arylmethylene-1,3-Indandione

Abstract

Arylmethylene-1,3-indandione-based molecular glasses were synthesized starting from 1,3-indandione. These compounds were found to constitute novel charge transporting materials and were examined by various techniques including differential scanning calorimetry, electron photoemission, cyclic voltammetry, and xerographic time-of-flight techniques. The electron photoemission spectra of the layers showed the ionization potentials of 5.8–5.9 eV. The cyclic voltammograms and the charge carrier mobilities measured by the time-of-flight technique confirm that synthesized molecular glasses are n-channel organic semiconducting materials. The electron drift mobility exceeds 10⁻⁸ cm² V⁻¹ s⁻¹ at strong electric fields.

Keywords:

• 1,3-indandione
• charge transport
• electron drift mobility
• ionization potential
• molecular glasses

Acknowledgments

The financial support of this research by the Lithuanian Science and Studies Foundation is gratefully acknowledged.