Jump to main content
Jump to site search


Efficient white-light emission from single polymer system with “spring-like” self-assemblies induced emission enhancement and intramolecular charge transfer characteristics

Abstract

Over the past few decades, aggregation induced emission enhancement (AIEE) is marked as a powerful tool to offset the bottle-neck problem of the aggregation caused quenching (ACQ) effect in organic light emitting diodes (OLEDs). However, the application of fluorophores with AIEE properties to enhance the efficiency of the non-doped white light-emitting single layer polymer is scarce. We report here a novel orange-red emitting multifunctional organic fluorophore consisting of two terminal attachment of push–pull moieties separated by a biphenyl free rotor named BPPTA and its copolymers. High photoluminescence quantum yield (ΦPL) of 69.1 % is observed for BPPTA with strong intramolecular charge transfer (ICT) and AIEE characteristics. A meticulous investigation shows that the enhanced emission in the solid state is due to the formation of “J-aggregates” with ordered supramolecular self-assembly. Interestingly, BPPTA 0.1 exhibited unique ordered “spring-like” supramolecular self-assembly and significant diminish in charge trapping due to ambipolar charge transport nature. As a result, pure and efficient white light emission with commission Internationale de l’Eclairage (CIE) coordinates of (0.32, 0.33) and maximum luminance, current and power efficiencies of 15672 cd/m2, 9.30 cd/A and 7.98 lm/W, respectively. The DFT and TD-DFT analyses of BPPTA-gen and copolymer model systems have strongly typified the presence of an intramolecular charge transfer (ICT) characteristics. This is hitherto one of the best polymer system for dopant-host non-doped single layer two color polymer white organic light-emitting devices (PWOLEDs).

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 10 Mar 2017, accepted on 12 Apr 2017 and first published on 12 Apr 2017


Article type: Paper
DOI: 10.1039/C7TC01036B
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
  •   Request permissions

    Efficient white-light emission from single polymer system with “spring-like” self-assemblies induced emission enhancement and intramolecular charge transfer characteristics

    E. Ravindran and N. Somanathan, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC01036B

Search articles by author