Light-Emitting and Hole-Transporting Polymers for LEDs

Autor:	Toshihiro Ohnishi, Takanobu Noguchi, Fumi Yamaguchi, Masato Ueda, Shuji Doi
Rok vydání:	1997
Předmět:	chemistry.chemical_classification Electron mobility Materials science Bilayer Arylene Polymer Triphenylamine Photochemistry law.invention chemistry.chemical_compound chemistry law Side chain Polysilane Light-emitting diode
Zdroj:	MRS Proceedings. 488
ISSN:	1946-4274 0272-9172
DOI:	10.1557/proc-488-21
Popis:	Various copolymers of arylene vinylenes, having strong fluorescence, showed predominantly the emission in the multi-layer device using an electron-transporting material(ETM) such as tris(8-quinolinolato)aluminum(Alq3). The emission from Alq3 was suppressed due to the high hole-injection barrier from the copolymers to ETM in spite of low or no barriers of electron injection from ETM to the copolymers. We have successfully prepared highly hole-transporting polysilane having a triphenylamine group as a side chain(TPA-PS). The hole mobility as high as 10 cm3cm2/Vs is attributable to the intermolecular hopping process facilitated by the interaction between the polysilane backbone and the triphenylamine group. The polysilane is effectively used as a hole transporting material. The bilayer LED device consisting of TPA-PS and Akb3 showed high luminance (2000cd/m2) and high efficiency (4cd/A).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::03f3004026f569f39c2d11db1a1a4420 https://doi.org/10.1557/proc-488-21 Zobrazit plný text záznamu Full text from SpringerLink