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Straight Forward Synthesis of Conjugated Polymers for Deep Red to NIR PLED Containing Chlorine Atoms on The Backbone

Authors
Journal
Organic Electronics
1566-1199
Publisher
Elsevier
Volume
15
Issue
7
Identifiers
DOI: 10.1016/j.orgel.2014.03.030
Keywords
  • Chlorine
  • Semiconductors
  • Deep Red To Nir Light-Emitting Diodes

Abstract

Abstract High molecular weight and non-crosslinking conjugated donor-acceptor copolymers with chlorine on the backbones were straight forward synthesized for the first time under Stille condensation reaction by using the different reaction activities between chlorine and bromine atoms. The chlorine-bearing polymers exhibited much lower LUMO, larger Stokes shift and lower self-absorption compared with the non-chloride analogue, for the electron affinity and large steric hindrance of chlorine atoms. Deep red to NIR emission centered at 698 nm was obtained with brightness about 1500 cd/m2 and centered at 708 nm was obtained with brightness over 400 cd/m2 based on dopant/host system.

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