Polymer White-Light-Emitting Diodes with High Work Function Cathode Based on a Novel Phosphorescent Chelating Copolymer

Autor:	Zhou Jian-Lin, Zhang Yong, Peng Jun-Biao, Xiong Yan, Huang Wen-Bo, Cao Yong
Rok vydání:	2007
Předmět:	chemistry.chemical_classification Materials science business.industry Analytical chemistry General Physics and Astronomy chemistry.chemical_element Polymer Electroluminescence Cathode law.invention chemistry law Copolymer Optoelectronics Work function Iridium business Phosphorescence Diode
Zdroj:	Chinese Physics Letters. 24:3547-3550
ISSN:	1741-3540 0256-307X
Popis:	Polymer white-light-emitting diodes are fabricated based on the blend of poly[9,9-di-(2-ethylhexyl)-fluorenyl-2,7-diyl]-end capped with polysilsesquioxane (PFO) and a chelating copolymer ofpoly[(9,9-bis(3'-(N,N-dimethylamino) propyl)-2,7-fluorene-alt-2,7-(9,9-dioctylfluorene))-co- [2,7-(9,9-dioctlyfluorene)-alt-5,5-bis(2-(4-methyl-1-naphtha-lene) pyridine-C2,N) iridium (III) acethylacetonate]] (PFN-NaIr). The device with the sole aluminium cathode is able to produce a comparably white electroluminescence efficiency of 1.31 cd/A to that of the device using low work function cathodes (such as Ba, Ca, etc.). The CIE coordinates of the white light emission consisting of red, green and blue three components are nearly at (0.34, 0.35). The mechanism of the white light emission from the device with the Al cathode is investigated, which is related to the efficient injection of electrons through the interface of PFN-NaIr/Al.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6448eb8eb513901d92c21695571b0a1e https://doi.org/10.1088/0256-307x/24/12/070 Zobrazit plný text záznamu