Fluorinated anthracene derivatives as deep-blue emitters and host materials for highly efficient organic light-emitting devices
Fluorinated anthracene derivatives as deep-blue emitters and host materials for highly efficient organic light-emitting devices
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DOI：
10.1039/c5ra02357b
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发表时间：
2015-07
期刊：
影响因子：
3.9
通讯作者：
Lu Li;B. Jiao;Yue Yu;Lin Ma;X. Hou;Zhaoxin Wu
中科院分区：
文献类型：
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作者：
Lu Li;B. Jiao;Yue Yu;Lin Ma;X. Hou;Zhaoxin Wu
Novel fluorinated anthracene based deep-blue-emitting molecules, namely 9,10-bis-(n′-fluoro-biphenyl-3-yl)-anthracene (nF-DPAs), have been designed and synthesized by a Suzuki cross-coupling reaction. The influence of substitution position of fluorinated electron-withdrawing group on the energy levels and photophysical properties of nF-DPAs was studied by experiment and density functional theory (DFT). Organic light-emitting devices (OLEDs) using nF-DPAs as non-doped emitter exhibit bright deep blue electroluminescence with Commisssion Internationale de L'Eclairage (CIE) coordinates of (0.15, 0.09) for 2F-DPA, (0.15, 0.09) for 3F-DPA, and (0.15, 0.07) for 4F-DPA. Furthermore, it was demonstrated that these nF-DPAs serve as excellent host materials for 4,4′-Bis[4-(di-p-tolylamino)styryl]biphenyl (DPAVBi). Especially, OLEDs using 2F-DPA as the fluorescent host exhibit pure blue emission with CIE coordinates of (0.15, 0.30), high luminance over 20 000 cd m−2, high current efficiency of 9.6 cd A−1, and high external quantum efficiency of 5.2%. Our new fluorinated derivatives show potential applications for highly efficient blue OLEDs.
