Fluorenes substituted with fluorophenyl, difluorophenyl or trifluorophenyl fragments as materials for organic light emitting diodes. (21st November 2016)

• Record Type: Journal Article
• Authors: Krucaite, G.; Tavgeniene, D.; Stulpinaite, B.; Sipaviciute, D.; Buika, G.; Zaleckas, E.
• Is Part Of: Molecular crystals and liquid crystals. Volume 640(2016)
• Page Start: 173
• Page End: 179
• Publication Date: 2016-11-21
• Subjects: Electro-active material -- amorphous material -- glass transition temperatures -- electroluminescent device -- photometric efficiency; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2016.1257331
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: 9, 9-Diethylfluorenes substituted with two fluorophenyl, difluorophenyl or trifluorophenyl fragments were synthesized by the multi-step synthetic rout. The materials were characterized by 1 H NMR spectroscopy, mass spectrometry, differential scanning calorimetry and thermogravimetric analyses. Some of the electro-active derivatives could form thin amorphous films and were tested as solution processed hole transporting layers in organic light- emitting diodes with Alq3 as the emitter and electron transporting material. Some of the electroluminescent devices demonstrated turn voltage of 5.5 V, a maximal photometric efficiency of about 1.0 cd/A and maximum brightness exceeding 960 cd/m 2 .