1. |
|
|
2. |
|
|
3. |
- Edman, Ludvig, 1967-, et al.
(författare)
-
Single-component light-emitting electrochemical cell with improved stability
- 2003
-
Ingår i: Applied Physics Letters. - : American Institute of Physics (AIP). - 0003-6951 .- 1077-3118. ; 82:22, s. 3961-3963
-
Tidskriftsartikel (refereegranskat)abstract
- We report a single-component polymeric light-emitting electrochemical cell with poly[9,9'-bis[6"-(N, N, N-trimethylammonium)hexyl]fluorene-alt-co-phenylene]bromide (PFN+Br-) as the active material. Indium tin oxide/PFN+Br-/aluminum sandwich structures demonstrate a low and thickness-independent turn-on voltage (2.9 V) for blue light emission. Thermophysical characterization shows that PFN+Br- is in a metastable amorphous phase after spin casting, but that crystallization takes place at elevated temperatures. With this information at hand, we allowed devices to turn-on via ionic redistribution (and the formation of a p-i-n junction) in the amorphous phase, and then stabilized this desired configuration through crystallization. We find significantly improved lifetimes and relatively fast turn-on times for these single-component devices operating at room temperature.
|
|
4. |
|
|
5. |
|
|
6. |
|
|