Issue 6, 2022

Spirobifluorene modified electron transport materials for high efficiency in phosphorescent organic light-emitting diodes

Abstract

Spirobifluorene modified materials, 2,7-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-9,9′-spirobi[fluorene] (SBFTrz), 2,7-bis(4-phenylbenzo[4,5]thieno[3,2-d]pyrimidin-2-yl)-9,9′-spirobi[fluorene] (SBFBTP) and 2,7-bis(4-phenylbenzofuro[3,2-d]pyrimidin-2-yl)-9,9′-spirobi[fluorene] (SBFBFP), which have good electron transport and thermal properties were developed as electron transport layers (ETLs). The common core, spirobifluorene, is good for transporting carriers due to two fluorene units perpendicular to each other and has a high triplet energy due to disconnection of conjugation through the sp3 carbon. Additionally, the electron transport moieties of diphenyltriazine, benzothienopyrimidine, and benzofuropyrimidine can provide good electron transport properties and high triplet energy. Therefore, the combination of the spirobifluorene core with the electron transport units offered ETLs overperforming a conventional ETL. The new ETL materials lowered device driving voltage, enhanced quantum efficiency, and more than doubled the lifetime of green phosphorescent organic light-emitting diodes.

Graphical abstract: Spirobifluorene modified electron transport materials for high efficiency in phosphorescent organic light-emitting diodes

Supplementary files

Article information

Article type
Research Article
Submitted
13 Des 2021
Accepted
24 Jan 2022
First published
25 Jan 2022

Mater. Chem. Front., 2022,6, 757-764

Spirobifluorene modified electron transport materials for high efficiency in phosphorescent organic light-emitting diodes

J. A. Kang, J. Lim and J. Y. Lee, Mater. Chem. Front., 2022, 6, 757 DOI: 10.1039/D1QM01610E

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