大久助教のポリイオン液体電子注入層に関する論文、「Poly(pyridinium iodide ionic liquid)-based Electron Injection Layer for Solution-processed Organic Light-emitting Devices」が、英国王立化学会(RSC) の J. Mater. Chem. C (IF: 4.696) にアクセプトされました。大久先生、おめでとうございます！
By S. Ohisa, Y.-J. Pu, J. Kido
Abstract: The development of electron injection materials is one of the most important steps in obtaining highly efficient low-driving-voltage organic light-emitting devices (OLEDs). In this paper, we report poly(ionic liquid) (PIL)-based electron injection layers (EILs) for solution-processed OLEDs. We synthesized poly(N-alkyl-4-vinyl-pyridinium iodide) containing three different alkyl chains (propyl, butyl, and hexyl chains) and investigated the charge-transfer interactions between the pyridinium cations and the iodide anions along with the electronic structures and thermal properties of the PILs. We also fabricated and evaluated OLEDs containing PILs as EILs. The fabricated OLEDs exhibited lower driving voltages than the conventional device containing an alkali metal complex (8-quinolinolato lithium) as the EIL. The longer alkyl chain of the PILs was more effective in reducing the driving voltage.
