Spirally configured cis-stilbene/fluorene hybrid materials as hole-blocking type electron-transporters for OLED
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United States of America Patent
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Dec 8, 2015
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Dec 27, 2014
filing date -
Oct 15, 2014
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Abstract
The present invention provides a series of spirally configured cis-stilbene/fluorene hybrid materials, which are spirally-configured cis-stilbene/fluorene derivatives having glass transition temperatures ranged from 110° C. to 135° C., decomposition temperatures ranged from 380° C. to 425° C., reversible electron transport property, and balanced charges motilities. In addition, a variety of experimental data have proved that this spirally configured cis-stilbene/fluorene hybrid materials can indeed be used as a hole-blocking type electron-transporter and/or a host material for phosphorescent OLEDs. Moreover, the experiment data also reveal that the OLEDs using the spirally configured cis-stilbene/fluorene hybrid materials can indeed be used as the hole-blocking type electron-transporter or as a host materials, which are able to show excellent external quantum efficiency (ηext), current efficiency (ηc), power efficiency (ηp), maximum luminance (Lmax), and device lifetime performances much better than the conventional or commercial OLEDs.
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