Glass-Forming Hole-Transporting Triphenylamine-Based Hydrazones with Reactive Functional Groups

Abstract

Synthesis and the properties of a series of triphenylamine-based hydrazones are reported. The dependence of their thermal and glass-forming properties on their chemical structure is discussed. The ionization potentials of the synthesized hydrazones measured by the electron photoemission technique range from 5.16 to 5.32 eV. Hole-drift mobilities of some derivatives molecularly dispersed in bisphenol Z polycarbonate exceed 10⁻⁴ cm²V⁻¹s⁻¹ at high electric fields (10⁶ V/cm),at room temperature.

Keywords:

• Hole-drift mobility
• Hydrazone
• Ionization potential
• Triphenylamine

ACKNOWLEDGMENTS

Financial support of this research by the Lithuanian Science and Studies Foundation is gratefully acknowledged. Habil. dr. V. Gaidelis from the Department of Solid State Electronics, Vilnius University, is thanked for the ionization potential measurements.

Notes

^aObtained as an amorphous material.

^bFirst heating only.

μ₀*: zero field mobility.

μ**: hole-drift mobility values at electric field E = 6.4 · 10⁴ V/cm.