Issue 43, 2011

Correlation between the electronic structures of transition metal oxide-based intermediate connectors and the device performance of tandem organic light-emitting devices

Abstract

The impact of electronic structures on the functionality of transition metal oxide-based intermediate connectors for tandem organic light-emitting devices is investigated by studying the interfaces and the corresponding devices. For a typical transition metal oxide-based intermediate connector, consisting of a heterointerface between MoO3 and Mg-doped tris(8-quinolinolato)aluminum (Mg:Alq3), it is identified that MoO3 is essential to the charge generation and separation process, which occurs at the interface between MoO3 and the adjacent hole-transporting layer (HTL) viaelectron transfer from the highest occupied molecular orbital of the HTL into the conduction band of MoO3. In addition, the incorporation of a Mg:Alq3 layer is indispensable to the functionality of the intermediate connector, which not only facilitates the electron injection from MoO3 into the electron-transporting layer of the adjacent electroluminescent (EL) unit, but also blocks the leakage of holes across the intermediate connector into the HTL of the other adjacent EL unit.

Graphical abstract: Correlation between the electronic structures of transition metal oxide-based intermediate connectors and the device performance of tandem organic light-emitting devices

Article information

Article type
Paper
Submitted
02 Jun 2011
Accepted
30 Aug 2011
First published
26 Sep 2011

J. Mater. Chem., 2011,21, 17476-17482

Correlation between the electronic structures of transition metal oxide-based intermediate connectors and the device performance of tandem organic light-emitting devices

Q. Bao, J. Yang, Y. Xiao, Y. Deng, S. Lee, Y. Li and J. Tang, J. Mater. Chem., 2011, 21, 17476 DOI: 10.1039/C1JM12515J

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.

Spotlight

Advertisements