Highly Efficient Multifunctional Phosphorescent Dendrimers Consisting of an Iridium-Complex Core and Charge-Transporting Dendrons for Organic Light-Emitting Devices

Autor:	Shizuo Tokito, Toshiyasu Suzuki, Toshimitsu Tsuzuki, Nobuhiko Shirasawa
Rok vydání:	2005
Předmět:	Core (optical fiber) Materials science chemistry Dendrimer OLED chemistry.chemical_element Charge (physics) Quantum efficiency Nanotechnology Iridium Phosphorescence Amorphous solid
Zdroj:	MRS Proceedings. 871
ISSN:	1946-4274 0272-9172
Popis:	We report a novel class of emitting materials for use in the organic light-emitting devices (OLEDs): multifunctional phosphorescent dendrimers that have a phosphorescent core and have charge transporting dendrons. We have synthesized first-generation and second-generation dendrimers consisting of a fac-tris(2-phenylpyridine)iridium [Ir(ppy)3] core and hole transporting phenylcarbazole-based dendrons. Smooth amorphous films of these dendrimers were formed by spin-coating them from solutions. The OLEDs using the dendrimer exhibited bright green or yellowish-green emission from the Ir(ppy)3 core. The external quantum efficiency of the OLED using the mixture film of the first-generation dendrimer and an electron-transporting material was as high as 7.6%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c902ec5b666d04f3ade6c44e7fcc807d https://doi.org/10.1557/proc-871-i2.8 Zobrazit plný text záznamu Full text from SpringerLink