Stability improvement of organic light emitting diodes by the insertion of hole injection materials on the indium tin oxide substrate
Journal Article
·
· Journal of Applied Physics
- Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106, Taiwan (China)
The degradation of organic light-emitting diodes (OLEDs) is a very complex issue, which might include interfacial charge accumulation, material diffusion, and electrical-induced chemical reaction during the operation. In this study, the origins of improvement in device stability from inserting a hole injection layer (HIL) at the indium tin oxide (ITO) anode are investigated. The results from aging single-layer devices show that leakage current increases in the case of ITO/hole transport layer contact, but this phenomenon can be prevented by inserting molybdenum oxide (MoO{sub 3}) or 1,4,5,8,9,11-hexaazatriphenylene hexacarbonitrile (HAT-CN{sub 6}) as an HIL. Moreover, X-ray photoemission spectroscopy suggests that the diffusion of indium atoms and active oxygen species can be impeded by introducing MoO{sub 3} or HAT-CN{sub 6} as an HIL. These results reveal that the degradation of OLEDs is related to indium and oxygen out-diffusion from the ITO substrates, and that the stability of OLEDs can be improved by impeding this diffusion with HILs.
- OSTI ID:
- 22271118
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 12 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Enhancement of efficiencies for tandem green phosphorescent organic light-emitting devices with a p-type charge generation layer
Insertion of an organic interlayer for hole current enhancement in inverted organic light emitting devices
Materials for controlling the epitaxial growth of photoactive layers in photovoltaic devices
Journal Article
·
Wed Oct 15 00:00:00 EDT 2014
· Materials Research Bulletin
·
OSTI ID:22420584
Insertion of an organic interlayer for hole current enhancement in inverted organic light emitting devices
Journal Article
·
Mon Aug 09 00:00:00 EDT 2010
· Applied Physics Letters
·
OSTI ID:21466890
Materials for controlling the epitaxial growth of photoactive layers in photovoltaic devices
Patent
·
Mon Dec 27 23:00:00 EST 2021
·
OSTI ID:1860217