Circularly polarized polymeric light-emitting diodes: preparation and properties

Abstract

Organic light emitting diodes with circularly polarized luminescence (CPL) properties have attracted extensive attention owing to their significant potential in 3D displays, spintronics, encrypted data storage, and so forth. Amongst various reported CPL materials, polymer-based chiral emitters constitute an important class because of their advantages of high thermal stability, good film-forming properties, low cost and good solution processability, which are helpful in developing emission-color-adjustable, large-area and flexible photoelectric devices. In this review, we systematically summarize state-of-the-art circularly polarized polymeric light-emitting diodes (CP-PLEDs), in which different types of polymer-based emitting materials covering chiral conjugated luminescent polymers, achiral conjugated luminescent polymers doped with chiral inducers, and chiral polymer-based metal complexes are introduced. Additionally, the challenges and opportunities for the future development of CP-PLEDs are also discussed. This review article is expected to stimulate more unprecedented achievements of polymer-based CPL emitters as well as their related electroluminescent devices, further promoting their future practical applications.