P‐14.1: Highly Polarized Aligned Quantum Rods Fluorescent Film Based on Contact Ink‐Jet Printing Method

Abstract

In recent years, fluorescent quantum rods (QRs) receive much attention because of their properties of emitting specific wavelength polarized light with narrow full width at half maximum (FWHM). Therefore, QRs are usually aligned on devices, such as light emitting diodes, laser, and liquid crystal display (LCD), as a polarizer. In order to emit the light with a high degree of polarization (DOP), QRs need to be controlled and aligned almost along one direction on large‐scaled devices. However, most of the proposed effective alignment approaches cannot be applied to a large area. Hence, we firstly propose the contact ink‐jet printing (CIJP) method to align CdSe/CdS core/shell QRs. With the ink being printed, the QRs can move driven by ink flowing. Eventually, the QRs will be aligned along the printed trajectories and become a film with DOP of more than 40%. Furthermore, CIJP can realize arbitrarily large area fabrication without reducing DOP value. In the future, this method can be utilized to print on large‐scaled substrates directly to fabricate polarized optoelectronic devices, and further applied to LCD backlights and optical lenses.