| abstract |
The present invention provides a bipolar compound derived from cis-stilbene/fluorene spirochete, which is a cis-stilbene/fluorene spirochete derivative comprising a cis-stilbene compound and a fluorene compound, And it has a glass transition temperature between 110°C and 135°C, a thermal cracking temperature between 380°C and 425°C, reversible electron transport properties, and excellent charge carrier balance transport properties. Moreover, the experimental results also confirmed that the organic light-emitting diodes using the cis-stilbene/fluorene spirochete derivatives of the present invention as the electron transport layer have excellent external quantum efficiency, current efficiency, power efficiency, maximum brightness, and device life. Significantly superior to organic light-emitting diodes of the prior art. |