Issue 37, 2016

Degradation study of organic light-emitting diodes with solution-processed small molecule phosphorescent emitting layers

Abstract

The degradation mechanisms of solution processed small molecule phosphorescent OLEDs are investigated along with thermal evaporated devices. Hole-induced degradation in the presence of excited states is found to be a major culprit for the fast degradation in solution-processed devices. Degradation in the solution-processed emitting layer (EML) is found to be strongly dependent on the initial hole injection/transport properties of the EML. Gas chromatography-mass spectrometry (GC-MS) studies on solvents used to prepare the solution-processed EMLs reveal that solvent impurities are the dominant reason for their substantially shorter operational lifetime compared with thermal evaporated devices.

Graphical abstract: Degradation study of organic light-emitting diodes with solution-processed small molecule phosphorescent emitting layers

Article information

Article type
Paper
Submitted
13 Jul 2016
Accepted
16 Aug 2016
First published
16 Aug 2016

J. Mater. Chem. C, 2016,4, 8696-8703

Degradation study of organic light-emitting diodes with solution-processed small molecule phosphorescent emitting layers

S. Liu, C. Peng, A. Cruz, Y. Chen and F. So, J. Mater. Chem. C, 2016, 4, 8696 DOI: 10.1039/C6TC02962K

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