Issue 5, 2018

Synthesis and properties of wide bandgap polymers based on tetraphenylsilane and their applications as hosts in electrophosphorescent devices

Abstract

Wide bandgap materials are important in the organic optoelectronic field. In this study, a diphenylphosphine oxide-functionalized tetraphenylsilane moiety was designed and applied in the construction of wide bandgap materials. The wide bandgap polymer PFSCPO was synthesized via a Suzuki coupling reaction between diphenylphosphine oxide substituted tetraphenylsilane and carbazole modified dihexylfluorene. PFSC without the diphenylphosphine oxide group was also prepared for comparison. They both show high thermal stabilities and good morphological stabilities. Doped films using these two polymers as hosts and Ir(ppy)3 as a guest were prepared via the spin-coating method. Compared with PFSC, the diphenylphosphine oxide group with strong electron-withdrawing property decreased the LUMO energy level of PFSCPO and facilitated electron injection in OLEDs. The turn-on voltage was 7.5 V in the PFSC/Ir(ppy)3 doped device, which reduced to 6.3 V in the PFSCPO/Ir(ppy)3 doped device. The maximum current efficiency also increased from 8.83 cd A−1 to 9.33 cd A−1.

Graphical abstract: Synthesis and properties of wide bandgap polymers based on tetraphenylsilane and their applications as hosts in electrophosphorescent devices

Supplementary files

Article information

Article type
Paper
Submitted
31 Oct 2017
Accepted
17 Jan 2018
First published
18 Jan 2018

New J. Chem., 2018,42, 3344-3349

Synthesis and properties of wide bandgap polymers based on tetraphenylsilane and their applications as hosts in electrophosphorescent devices

X. Li, Q. Bai, J. Li, F. Lu, X. Sun and P. Lu, New J. Chem., 2018, 42, 3344 DOI: 10.1039/C7NJ04213B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements