Ultrastable supramolecular self-encapsulated wide-bandgap conjugated polymers for large-area and flexible electroluminescent devices
Author(s)
Type
Journal Article
Abstract
Controlling chain behavior through smart molecular design provides the potential to develop ultrastable and efficient deep-blue light-emitting conjugated polymers (LCPs). Herein, a novel supramolecular self-encapsulation strategy is proposed to construct a robust ultrastable conjugated polydiarylfluorene (PHDPF-Cz) via precisely preventing excitons from interchain cross-transfer/coupling and contamination from external trace H2O/O2. PHDPF-Cz consists of a mainchain backbone where the diphenyl groups localize at the 9-position as steric bulk moieties, and carbazole (Cz) units localize at the 4-position as supramolecular π-stacked synthon with the dual functionalities of self-assembly capability and hole-transport facility. The synergistic effect of the steric bulk groups and π-stacked carbazoles affords PHDPF-Cz as an ultrastable property, including spectral, morphological stability, and storage stability. In addition, PHDPF-Cz spin-coated gelation films also show thickness-insensitive deep-blue emission with respect to the reference polymers, which are suitable to construct solution-processed large-scale optoelectronic devices with higher reproducibility. High-quality and uniform deep-blue emission is observed in large-area solution-processed films. The electroluminescence shows high-quality deep-blue intrachain emission with a CIE (0.16, 0.12) and a very narrow full width at half-maximum of 32 nm. Finally, large-area and flexible polymer light-emitting devices with a single-molecular excitonic behavior are also fabricated. The supramolecular self-encapsulation design provides an effective strategy to construct ultrastable LCPs for optoelectronic applications.
Date Issued
2019-01-04
Date Acceptance
2018-09-17
Citation
Advanced Materials, 2019, 31 (1)
ISSN
0935-9648
Publisher
Wiley
Journal / Book Title
Advanced Materials
Volume
31
Issue
1
Copyright Statement
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/30370608
Subjects
BEHAVIOR
Chemistry
Chemistry, Multidisciplinary
Chemistry, Physical
CIS
CONFORMATION
deep blue
DESIGN
flexible electroluminescent devices
LIGHT
Materials Science
Materials Science, Multidisciplinary
MOBILITY
Nanoscience & Nanotechnology
OLIGOMERS
PHASE
Physical Sciences
Physics
Physics, Applied
Physics, Condensed Matter
polyfluorene
POLYFLUORENES
Science & Technology
Science & Technology - Other Topics
self-encapsulated strategy
Technology
TRANSPORT
ultrastable
Publication Status
Published
Coverage Spatial
Germany
Article Number
1804811
Date Publish Online
2018-10-29