Synthesis of spiro[fluorene-9,9′-xanthene] derivatives and their application as hole-transporting materials for organic light-emitting devices

Autor:	Zengze Chu, Zhibin Lv, Xing Fan, Shaocong Hou, Hongwei Wu, Fuzhi Wang, Chao Zhang, Dan Wang, Dechun Zou
Rok vydání:	2012
Předmět:	Xanthene Materials science Carbazole Mechanical Engineering Metals and Alloys Fluorene Condensed Matter Physics Photochemistry Electronic Optical and Magnetic Materials Ullmann reaction Anode chemistry.chemical_compound chemistry Mechanics of Materials Materials Chemistry OLED Molecule Luminescence
Zdroj:	Synthetic Metals. 162:614-620
ISSN:	0379-6779
Popis:	A series of hole-transporting molecules based on spiro(fluorene-9,9′-xanthene) were designed and synthesized by a copper-catalyzed modified Ullmann reaction. These compounds have very high-lying HOMO levels (∼5.0 eV), which are beneficial for the hole-injection from ITO anode. The double-layer EL devices using DPA-SFXMe and DPA-SFXBu as hole-transporting layers exhibit lower turn-on voltage and higher efficiency compared with those of a typical NPB-based device. The DPA-SFXBu-based device exhibits high maximum luminescence of 21,712 cd/m 2 , and its power efficiency can reach a value of 2.31 lm/W, which is nearly 90% higher than that of a similar NPB-based device.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5f109e62b8a04f13f921154cc21dafe0 https://doi.org/10.1016/j.synthmet.2012.02.009 Zobrazit plný text záznamu Full Text from ScienceDirect