Abstract:
Compounds useful dopants for light emitting diodes and light emitting display devices are disclosed. The compounds have the following structure (Formula I): wherein R1a, R1b, R2a, R2b, Z1, Z2, X and Y are as defined herein. Light emitting diodes including the compounds of Formula I, light emitting devices including the same as well as methods associated with preparation and use of such compounds and devices are also provided.
Abstract:
Compounds useful dopants for light emitting diodes and light emitting display devices are disclosed. The compounds have the following structure (Formula I): wherein R1a, R1b, R2a, R2b, Z1, Z2, X and Y are as defined herein. Light emitting diodes including the compounds of Formula I, light emitting devices including the same as well as methods associated with preparation and use of such compounds and devices are also provided.
Abstract:
According to principals as disclosed herein an organic, light emitting diode assembly is provided having a first electrode. An electron injection layer is adjacent to the first electrode. A first electron transport layer composed of inorganic material is adjacent to the electron injection layer. A second electron transport layer composed of organic material is adjacent to the first electron transport layer and in contact with an organic light emitting material layer. The organic light emitting material layer is in direct, abutting contact with the second electron transport layer. A hole transport layer is adjacent to the organic light emitting material layer and a second electrode is adjacent to the hole transport layer.
Abstract:
A light emitting diode includes a first electrode and a second electrode facing the first electrode. The light emitting diode further includes an emitting material layer (EML) disposed between the first electrode and the second electrode, and an electron transport layer (ETL) adjacent the EML. The ETL includes a plurality of first inorganic particles having a first average particle size, and a plurality of second inorganic particles having a second average particle size greater than the first average particle size. The plurality of first inorganic particles may also have a first energy bandgap, and a plurality of second inorganic particles may also have a second energy bandgap smaller than the first energy bandgap.
Abstract:
The present disclosure relates to a light-emitting diode (LED) in which an organic compound including an imidazolium-based cationic moiety and an amine-based anionic moiety substituted with a strong electron-withdrawing group such as a sulfonyl group or a cyano group is applied to a hole transfer layer, and a light-emitting device. By applying the organic compound according to the present disclosure to the hole transfer layer, an energy barrier between the hole transport layer and an emitting material layer is removed, and an LED having improved hole transport properties can be designed. Therefore, it is possible to realize and manufacture an LED and a light-emitting device, driven at a low voltage and having improved luminous efficiency.
Abstract:
A red phosphorescent compound includes a host material being capable of transporting an electron or a hole; and a dopant material represented by following Formula 1: wherein the is one of and each of R1 to R4 is one of the group consisting of hydrogen atom (H), C1 to C6 substituted or non-substituted alkyl group, C1 to C6 substituted or non-substituted alkoxy group, and halogen atom.
Abstract:
A red phosphorescent compound includes a host material being capable of transporting an electron or a hole; and a dopant material represented by following Formula 1: wherein the is one of and each of R1 to R4 is one of the group consisting of hydrogen atom (H), C1 to C6 substituted or non-substituted alkyl group, C1 to C6 substituted or non-substituted alkoxy group, and halogen atom.