大久助教（Dr. Satoru Ohisa）と、卒業生高橋省吾君（Mr. Shogo Takahashi, 2014年3月修卒）の塗布HAT-CN正孔注入層に関する論文、「Inhibition of Solution-processed 1,4,5,8,9,11-Hexaazatriphenylene-hexacarbonitrile Crystallization by Mixing Additives for Hole Injection Layers in Organic Light-Emitting Devices」が、Polymer Journal (IF: 1.629) にアクセプトされました。大久先生、高橋省吾君、おめでとうございます！
Inhibition of Solution-processed 1,4,5,8,9,11-Hexaazatriphenylene-hexacarbonitrile Crystallization by Mixing Additives for Hole Injection Layers in Organic Light-Emitting Devices
By S. Ohisa, Y.-J. Pu, S. Takahashi, T. Chiba, J. Kido
Abstract: We report the inhibition of solution-processed 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN) crystallization by mixing additives for hole injection layers (HILs) in organic light-emitting devices (OLEDs). Various additives were mixed with HAT-CN layer, including acrylates, compounds resembling HAT-CN, and arylamine derivatives. Among them, the HAT-CN films mixed with ditrimethylol propane tetraacrylate (AD-TMP) and pyrazino[2,3-f][1,10]phenanthroline-2,3-dicarbonitrile (PPDN) showed transparent appearance and high solvent resistances. The former was ascribed to the inhibition of the crystallization. We used these additives for preparing electron acceptor layers in charge generation layers (CGL) of CGL-only devices. The device prepared by mixing HAT-CN with PPDN showed lower driving voltage and was applied to the production of HIL in a solution-processed OLED. The device showed lower driving voltage and higher luminescent efficiency than devices containing conventional HIL, poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT:PSS).
