Real-time visualization of thermally activated degradation of the ITO/CuPC/NPB/Alq3 stack used in one of the organic light-emitting diodes
Description
We demonstrate the thermally activated degradation pathways of the ITO-coated glass/CuPc (copper phthalocyanine)/NPB (N, N'-di(naphthalene-1-yl)-N, N'-diphthalbenzidine)/Alq3 (tris(8-hydroxyquinoline aluminium) device by using variable temperature tapping mode atomic force microscopy. It is observed that the initially morphological change of the top Alq3 surface occurred at about 75 deg. C. NPB gradually erupted from the Alq3 capping layer at 120 deg. C. The NPB layer and the Alq3 layer were gradually mixed with increase in temperature from 130 deg. C. Simultaneously, de-wetting took place at the interface of CuPc/NPB. Using conducting atomic force microscopy we see that morphological change in the device leads to a variation in current-voltage characteristics of the degraded ITO/CuPc/NPB/Alq3 device. The results should shed light on the thermally activated degradation mechanisms of organic light-emitting diodes
Availability note (English)
Available online at http://stacks.iop.org/0022-3727/37/1603/d4_12_002.pdf or at the Web site for the Journal of Physics. D, Applied Physics (ISSN 1361-6463) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0022-3727/37/1603/d4_12_002.pdf; http://www.iop.org/;
- DOI
- 10.1088/0022-3727/37/12/002;
- PII
- S0022-3727(04)76233-6;
Publishing Information
- Journal Title
- Journal of Physics. D, Applied Physics
- Journal Volume
- 37
- Journal Issue
- 12
- Journal Page Range
- p. 1603-1608
- ISSN
- 0022-3727
- CODEN
- JPAPBE
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35083253
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM COMPOUNDS; ATOMIC FORCE MICROSCOPY; COPPER COMPLEXES; ELECTRIC CONDUCTIVITY; GLASS; INTERFACES; LAYERS; LIGHT EMITTING DIODES; MORPHOLOGICAL CHANGES; NAPHTHALENE; OXINE; SURFACES; VARIATIONS
- Descriptors DEC
- AROMATICS; AZAARENES; AZINES; COMPLEXES; CONDENSED AROMATICS; ELECTRICAL PROPERTIES; HETEROCYCLIC COMPOUNDS; HYDROCARBONS; HYDROXY COMPOUNDS; MICROSCOPY; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PHYSICAL PROPERTIES; PYRIDINES; QUINOLINES; SEMICONDUCTOR DEVICES; SEMICONDUCTOR DIODES; TRANSITION ELEMENT COMPLEXES