Improved electron injection of OLEDs with a thin PBD layer at Alq3/Cs2CO3 interface
Source abstract
Abstract
Abstract In this study, the effect of one oxadiazole derivative (PBD) using as an electron injection layer (EIL) at Alq 3 /Cs 2 CO 3 interface has been investigated. The present of PBD EIL was showed an interesting enhanced electron injection for OLEDs although the nominal electron injection barrier for PBD based OLEDs is much larger, because PBD owns an obvious higher intrinsic the Lowest Unoccupied Molecular Orbital level (2.3 eV) than that of Alq 3 (3.0 eV). For example, the current density of OLEDs at 8 V was increased from 54 mA/cm 2 to 168 mA/cm 2 when inserting a thin PBD layer (5 nm) at Alq 3 /Cs 2 CO 3 interface. Here the increased current is suggested associating with the changed electronic structure of PBD when it contacts with Cs 2 CO 3 .
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Organic Light-Emitting Diodes Research · Organic Electronics and Photovoltaics · Thin-Film Transistor Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Visible light emission from semiconducting polymer diodes10.1063/1.105039 ↗
2. Organic electroluminescent diodes10.1063/1.98799 ↗
3. Impact of the cathode metal work function on the performance of vacuum-deposited organic light emitting-devices
4. Role of ultrathin Alq[sub 3] and LiF layers in conjugated polymer light-emitting diodes10.1063/1.1571654 ↗
5. Lithium doping of semiconducting organic charge transport materials10.1063/1.1359161 ↗
6. Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode10.1063/1.118344 ↗
7. Tris-(8-hydroxyquinoline)aluminum-based organic light-emitting devices with Al/CaF2 cathode: performance enhancement and interface electronic structures10.1063/1.1474602 ↗
8. Bright high efficiency blue organic light-emitting diodes with Al2O3/Al cathodes10.1063/1.119325 ↗
9. Electronic structures and electron-injection mechanisms of cesium-carbonate-incorporated cathode structures for organic light-emitting devices10.1063/1.2192982 ↗
10. Highly power efficient organic light-emitting diodes based on Cs2CO3 n-doped and MoO3 p-doped carrier transport layers10.1088/0268-1242/24/3/035009 ↗
11. Effectiveness of tris-(8-Hydroxyquinoline)-aluminum doped with cesium-derivatives in organic light-emitting diodes10.1016/j.tsf.2010.01.007 ↗
12. Organic EL cells using alkaline metal compounds as electron injection materials10.1109/16.605462 ↗
13. Stable inverted bottom-emitting organic electroluminescent devices with molecular doping and morphology improvement10.1063/1.2335374 ↗
14. Elucidation of the electron injection mechanism of evaporated cesium carbonate cathode interlayer for organic light-emitting diodes10.1063/1.2429920 ↗
15. Low-work-function surface formed by solution-processed and thermally deposited nanoscale layers of cesium carbonate10.1002/adfm.200700051 ↗
16. Electron injection property at the organic-metal interface in organic light-emitting devices revealed by current-voltage characteristics10.1016/j.physb.2008.12.006 ↗
17. Improved performance of organic light emitting devices using triazole/Cs2CO3/Al cathode
18. Excited state luminescence of multi-(5-phenyl-1, 3,4-oxadiazo-2-yl)benzenes in an electron-donating matrix: exciplex or electroplex?10.1021/jp9093063 ↗
19. Efficient exciplex emitting organic electroluminescent devices10.1063/1.1467614 ↗
20. Bandgap engineering in Alq3- and NPB-based organic light-emitting diodes for efficient green, blue and white emission10.1016/j.sse.2007.09.019 ↗
21. Improved hole-injection contact for top-emitting polymeric diodes10.1063/1.2731684 ↗
22. A fluorescent copolyimide containing perylene, fluorene and oxadiazole units in the main chain10.1016/j.reactfunctpolym.2005.10.008 ↗