Presentation Information
[9a-N306-10]Dipyrimidylpyridine-containing electron-transporter for efficient and long lifetime OLEDs
〇Yuhui Chen1, Takeshi Sano1,2, Taisei Kotaka1, Junji Kido1,2,3, Hisahiro Sasabe1,3 (1.Dept. of Organic Materials Science, Yamagata Univ., 2.Innovation Center of Organic Electronics, Yamagata Univ., 3.Frontier Center for Organic Materials, Yamagata Univ.)
Keywords:
organic semiconductor,electron transporter,electron-injection with silver
Conventional electron-injection materials based on alkali metals are commonly used to lower operating voltage aiming for high efficiency and stable OLEDs. Recently, studies around the development of electron-transport materials (ETMs) showing enhanced electron injection with air-stable silver metal have been attractive for both long-term stable OLEDs and further applications such as unencapsulated flexible devices. However, most above-mentioned ETMs are still confined to Phen derivatives which present several drawbacks, including low triplet energy (ET), low glass-transition temperature (Tg) and limited synthetic variety when applied as ETMs.
Previously, we developed a non-Phen ETM named 2,6-di(pyrimidin-2-yl)-4-([1,1'-biphenyl]-4-yl) pyridine (DPmPy-BP), suitable as a potentially air-stable electron-injetion material with Ag. Nevertheless, the poor thermal stability due to its small molecular mass cause the device lifetime remain challenged.
Herein, we report a novel 2,6-bis(pyrimidin-2-yl) pyridine derivative DPmPy-DBF as a hign-end ETM which exhibits high ET, high Tg, and superior electron-injection combined with Ag.
Previously, we developed a non-Phen ETM named 2,6-di(pyrimidin-2-yl)-4-([1,1'-biphenyl]-4-yl) pyridine (DPmPy-BP), suitable as a potentially air-stable electron-injetion material with Ag. Nevertheless, the poor thermal stability due to its small molecular mass cause the device lifetime remain challenged.
Herein, we report a novel 2,6-bis(pyrimidin-2-yl) pyridine derivative DPmPy-DBF as a hign-end ETM which exhibits high ET, high Tg, and superior electron-injection combined with Ag.