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Obvious efficiency enhancement of organic light-emitting diodes by parylene-N buffer layer.
- Source :
-
Applied Physics Letters . 4/16/2012, Vol. 100 Issue 16, p163303-163303-4. 1p. 1 Diagram, 3 Graphs. - Publication Year :
- 2012
-
Abstract
- A parylene-N (PPXN) buffer layer inserted between anode and organic layers in typical organic light-emitting diodes (OLEDs) based on N, N′-bis(naphthalene-1-yl)-N, N′-bis(phenyl) benzidine (NPB) and tris (8-hydroxyquinolato) aluminum (Alq3) results in significant enhancement of the current efficiency. The enhancement can be 1.7 times higher compared to that of the buffer-free structure. Analyzing indicates that the buffer plays a role of blocking both the hole and electron current. Whether hole injection can be enhanced depends on electron accumulation at the buffer-organic interface. Inserting the PPXN buffer modifies carrier balance in the device, leading to the observed efficiency enhancement. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 100
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 74465352
- Full Text :
- https://doi.org/10.1063/1.4704365