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Enhancing the electroluminescent properties of organic light-emitting devices using a thin NaCl layer
- Source :
- Applied Physics Letters. 81:2581-2583
- Publication Year :
- 2002
- Publisher :
- AIP Publishing, 2002.
-
Abstract
- We report on the fabrication of organic light-emitting devices (OLEDs) using a thin NaCl interlayer as an electron-injection medium. The results show that the device containing the NaCl layer has a higher brightness and electroluminescent efficiency than the device without this layer. We also fabricated similar-structured comparable devices, which were prepared with a LiF layer as a different electron-injection medium. The maximum electroluminescent efficiency of the NaCl (1 nm)/Al cathode device was 2.85 cd/A, which is higher than the 2.25 cd/A of the LiF (1 nm)/Al cathode device. The ultrathin NaCl layer modified the carrier injection properties. In conclusion, the NaCl layer between a cathode and an emitting layer of OLEDs can be used as the carrier injection layer to improve the EL properties.
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 81
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........37964a4e5eac03c443da4d0fbab5703d