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Stability of the interface between indium-tin-oxide and poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) in polymer light-emitting diodes
| Content Provider | Semantic Scholar |
|---|---|
| Author | Jong, M. P. De Ijzendoorn, Leo J. Van Voigt |
| Copyright Year | 2000 |
| Abstract | A cause for degradation of polymer light-emitting diodes is the oxidation of the polymer by oxygen diffusing out of the indium-tin-oxide (ITO) anode. This problem can be solved by the introduction of an organic hole-injecting film, poly-(3,4-ethylenedioxythiophene) (PEDOT) doped with poly(styrenesulfonate) (PSS), between the ITO and the emissive polymer. Indeed, a dramatic improvement of the lifetime and also the luminous efficiency has been observed. However, our Rutherford backscattering (RBS) studies show that the ITO/PEDOT:PSS interface is not stable. In as prepared glass/ITO/PEDOT:PSS samples 0.02 at. % indium was found in the PEDOT:PSS film. Annealing in a nitrogen atmosphere at 100 °C during 2500 h increased the indium concentration to 0.2 at. %. Upon exposure to air much faster degradation of the ITO/PEDOT:PSS interface was observed; after several days in air the amount of indium reached a saturation concentration of 1.2 at. %. The degradation of the interface can be explained by etching of the IT... |
| Starting Page | 2255 |
| Ending Page | 2257 |
| Page Count | 3 |
| File Format | PDF HTM / HTML |
| DOI | 10.1063/1.1315344 |
| Alternate Webpage(s) | https://pure.tue.nl/ws/files/2341720/Metis201993.pdf |
| Alternate Webpage(s) | https://doi.org/10.1063/1.1315344 |
| Volume Number | 77 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
