Control of Spontaneous Orientation Polarization in Organic Semiconductors: The Role of Molecular Structure and Film Growth Conditions

TL;DR

This paper explores how molecular design and film growth conditions influence spontaneous orientation polarization in organic semiconductors, impacting their use in light-emitting devices.

Contribution

It provides insights into controlling SOP through molecular and process design, enhancing device performance.

Findings

Molecular structure affects SOP magnitude.

Growth conditions influence molecular alignment.

Controlling SOP improves organic light-emitting device efficiency.

Abstract

Spontaneous orientation polarization (SOP) occurs when molecules with a finite permanent dipole moment are grown as thin films by physical vapor deposition and their alignment is such that a net non-zero polarization remains. We discuss how SOP in organic semiconductors can be controlled by the design of molecules as well as the film growth conditions and discuss its relevance in organic light-emitting devices.