Electron injection barrier reduction for organic light-emitting devices by quinacridone derivatives.

Water/alcohol-soluble quinacridone derivatives have been synthesized and utilized as an electron injection layer in organic light-emitting diodes. Initial results are very promising, as a device with a layer of Na(+)QHSO(3)(-) adjacent to an Al cathode exhibited a luminance efficiency (1.65 cd A(-1)) that was significantly enhanced relative to the efficiency (0.85 cd A(-1)) of a control device with an unstable, lower work function Ba/Al cathode.

[1]  A. Heeger,et al.  Electron injection into organic semiconductor devices from high work function cathodes , 2008, Proceedings of the National Academy of Sciences.

[2]  Thuc‐Quyen Nguyen,et al.  Imaging the Interfaces of Conjugated Polymer Optoelectronic Devices , 2008 .

[3]  K. Meerholz.  Device physics: Enlightening solutions , 2005, Nature.

[4]  Daniel Moses,et al.  Multilayer Polymer Light‐Emitting Diodes: White‐Light Emission with High Efficiency , 2005 .

[5]  D. Moses,et al.  Water/Methanol‐Soluble Conjugated Copolymer as an Electron‐Transport Layer in Polymer Light‐Emitting Diodes , 2005 .

[6]  N. Armstrong,et al.  Dendritic incorporation of quinacridone: solubility, aggregation, electrochemistry, and solid-state luminescence. , 2005, Chemical communications.

[7]  Fei Huang,et al.  Efficient Electron Injection from a Bilayer Cathode Consisting of Aluminum and Alcohol‐/Water‐Soluble Conjugated Polymers , 2004 .

[8]  F. D. De Schryver,et al.  Aggregation properties of soluble quinacridones in two and three dimensions , 2002 .

[9]  J. Reymond,et al.  A fluorescent metal sensor based on macrocyclic chelation , 2001 .

[10]  G. Lincke.  A review of thirty years of research on quinacridones. X-ray crystallography and crystal engineering , 2000 .

[11]  K. Seki,et al.  ENERGY LEVEL ALIGNMENT AND INTERFACIAL ELECTRONIC STRUCTURES AT ORGANIC/METAL AND ORGANIC/ORGANIC INTERFACES , 1999 .

[12]  Ching Wan Tang,et al.  Interface engineering in preparation of organic surface-emitting diodes , 1999 .

[13]  Ching Wan Tang,et al.  Doped organic electroluminescent devices with improved stability , 1997 .

[14]  Joseph Shinar,et al.  Fabrication and electroluminescence of double-layered organic light-emitting diodes with the Al2O3/Al cathode , 1997 .

[15]  C. Tang,et al.  Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode , 1997 .

[16]  Ian D. Parker,et al.  Carrier tunneling and device characteristics in polymer light‐emitting diodes , 1994 .

[17]  R. H. Friend,et al.  Efficient light-emitting diodes based on polymers with high electron affinities , 1993, Nature.

[18]  R. N. Marks,et al.  Light-emitting diodes based on conjugated polymers , 1990, Nature.

[19]  M. Yokoyama,et al.  Long-life organic solar cell fabrication using quinacridone pigment. , 1987 .

[20]  H. Liebermann.  Über die Bildung von Chinakridonen aus p‐Di‐arylamino‐terephtalsäuren. 6. Mitteilung über Umwandlungsprodukte des Succinylobernsteinsäureesters , 1935 .