Publications
Detailed Information
Spin-assembled nanolayer of a hyperbranched polymer on the anode in organic light-emitting diodes: The mechanism of hole injection and electron blocking
Cited 22 time in
Web of Science
Cited 13 time in Scopus
- Authors
- Issue Date
- 2008-11
- Publisher
- American Chemical Society
- Citation
- Langmuir, Vol.24 No.21, pp.12704-12709
- Abstract
- We introduced a spin-assembled nanolayer of hyperbranched poly(ether sulfone) with sulfonic acid terminal on top of an indium-tin oxide anode in organic light-emitting diodes. This results in great improvement in luminous efficiency, better than that of devices using a commercially available conducting polymer composition as a hole-injection layer. The effect of the nanolayer was investigated by impedance spectroscopy, photovoltaic measurement for built-in-potential, and transient electroluminescence. We concluded that the high luminous efficiency resulted from the efficient electron-blocking by the nanolayer and hole-injection assisted by the accumulation of electrons at the interface. This result implies that, for an efficient hole-injection layer, the electron-blocking capability should be incorporated in addition to the hole-injection and -transport capability.
- ISSN
- 0743-7463
- Files in This Item:
- There are no files associated with this item.
Item View & Download Count
Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.