Enhanced lifetime of organic light-emitting diodes using soluble tetraalkyl-substituted copper phthalocyanines as anode buffer layers
- 5 July 2016
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry C
- Vol. 4 (31), 7377-7382
- https://doi.org/10.1039/c6tc01864e
Abstract
This study describes two soluble tetraalkyl-substituted copper phthalocyanines (CuPcs) as hole-blocking materials that can be used in the Alq3-based organic light-emitting diodes (OLEDs). The hole-blocking characteristics of these Pc layers significantly impeded hole injection into the Alq3 emitting layer and thus decreased the production of unstable cationic Alq3 species, giving an enhanced OLED efficiency and stability compared with that of devices containing the widely used PEDOT:PSS. Moreover, the insolubility of the CuPcs in water together with their extremely high thermal and chemical stabilities led to the effective protection of the ITO anode, resulting in the increased operational stability of the OLEDs in air and the enhancement of the OLED durability.Keywords
This publication has 47 references indexed in Scilit:
- Multilayered graphene anode for blue phosphorescent organic light emitting diodesApplied Physics Letters, 2012
- Highly Efficient Hole Injection Using Polymeric Anode Materials for Small‐Molecule Organic Light‐Emitting DiodesAdvanced Functional Materials, 2009
- An Ultra Closely π‐Stacked Organic Semiconductor for High Performance Field‐Effect TransistorsAdvanced Materials, 2007
- Organic Semiconducting Oligomers for Use in Thin Film TransistorsChemical Reviews, 2007
- Improved performances of organic light-emitting diodes with metal oxide as anode bufferJournal of Applied Physics, 2007
- Spin-cast thin semiconducting polymer interlayer for improving device efficiency of polymer light-emitting diodesApplied Physics Letters, 2005
- Improving the thermal stability of organic light-emitting diodes by using a modified phthalocyanine layerApplied Physics Letters, 2002
- Stability of the interface between indium-tin-oxide and poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) in polymer light-emitting diodesApplied Physics Letters, 2000
- Degradation Mechanism of Small Molecule-Based Organic Light-Emitting DevicesScience, 1999
- Highly efficient and stable organic light-emitting diodesSynthetic Metals, 1997