Issue 3, 2019

Trap-induced conversion from singlet fission to intersystem crossing via in situ heating of rubrene-based organic light-emitting diodes

Abstract

An in situ heating method was used to investigate the effect of high temperature on the magneto-electroluminescence (MEL) of rubrene-based organic light-emitting diodes. The change of MEL indicated that the microscopic mechanism of the device converted from singlet fission (SF) to intersystem crossing (ISC) at 380 K. Analysis of the surface morphology, electroluminescence spectrum, and current–voltage curve of the device suggested that the SF-to-ISC conversion was caused by a large number of exciton traps generated in the organic layers of the device. These traps blocked the movement of excitons, which suppressed SF. By contrast, ISC was promoted by traps and became the main process. This work provides a detailed investigation of the dynamics of exciton evolution and deepens our understanding of electron–hole interaction mechanisms in organic devices at high temperature.

Graphical abstract: Trap-induced conversion from singlet fission to intersystem crossing via in situ heating of rubrene-based organic light-emitting diodes

Article information

Article type
Paper
Submitted
11 נוב 2018
Accepted
05 דצמ 2018
First published
08 דצמ 2018

J. Mater. Chem. C, 2019,7, 553-557

Trap-induced conversion from singlet fission to intersystem crossing via in situ heating of rubrene-based organic light-emitting diodes

H. Zhu, W. Jia, L. Chen, X. Tang, Y. Hu, R. Pan, J. Deng and Z. Xiong, J. Mater. Chem. C, 2019, 7, 553 DOI: 10.1039/C8TC05677C

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