Jump to main content
Jump to site search

Issue 7, 2021
Previous Article Next Article

Efficient white light-emitting polymers from dual thermally activated delayed fluorescence chromophores for non-doped solution processed white electroluminescent devices

Author affiliations

Abstract

Developing high-performance pure white-light emissive thermally activated delayed fluorescence (TADF) polymers, which is still challenging, is of great importance for realizing highly efficient, large-scale and low-cost white organic light-emitting diodes (white OLEDs), since they show several advantages, including ease of large-area fabrication via the solution process. In this work, we designed and synthesized a series of conjugated TADF copolymers, PCPSTTx (x = 1, 3, 5 and 10) with a backbone-donor/pendant-acceptor architecture, in which two TADF small molecules of bis[4-(3,6-di-tert-butylcarbazole)phenyl]sulfone (DTC-DPS) as a blue light emitter and 2-(4-(diphenylamino)-phenyl)-9H-thioxanthen-9-one-10,10-dioxide (TXO-TPA) as an orange light emitter were covalently linked with the conjugated backbone of N-9′-heptadecanyl-carbazole through their donor fragment. It is verified that the TADF features can be achieved by copolymers effectively from both TADF moieties. By adjusting the TXO-TPA content (x), the emission colors of the copolymers can be successfully tuned from yellow to pure white light. In particular, the non-doped OLEDs fabricated with PCPSTT1 exhibited stable pure white emission with a maximum luminance efficiency of 9.13 cd A−1, maximum external quantum efficiency of 4.17%, and CIE coordinates of (0.32, 0.35).

Graphical abstract: Efficient white light-emitting polymers from dual thermally activated delayed fluorescence chromophores for non-doped solution processed white electroluminescent devices

Back to tab navigation

Supplementary files

Article information


Submitted
05 Nov 2020
Accepted
19 Jan 2021
First published
20 Jan 2021

Polym. Chem., 2021,12, 1030-1039
Article type
Paper

Efficient white light-emitting polymers from dual thermally activated delayed fluorescence chromophores for non-doped solution processed white electroluminescent devices

P. Khammultri, W. Kitisriworaphan, P. Chasing, S. Namuangruk, T. Sudyoadsuk and V. Promarak, Polym. Chem., 2021, 12, 1030
DOI: 10.1039/D0PY01541E

Social activity

Search articles by author

Spotlight

Advertisements