ノグチ　ユタカ   NOGUCHI Yutaka   野口　裕    所属   明治大学  理工学部    職種   専任教授
言語種別	英語
発行・発表の年月	2016/10
形態種別	学術雑誌
査読	査読あり
標題	Simulation of OLEDs with a polar electron transport layer
執筆形態	共著(筆頭者以外)
掲載誌名	Organic Electronics
掲載区分	国外
出版社・発行元	Elsevier
巻・号・頁	39,pp.244-249
国際共著	国際共著
著者・共著者	S. Altazin, S. Zuefle, E. Knapp, C. Kirsch, T. D. Schmidt, L. Jaeger, Y. Noguchi, W. Bruetting, B. Ruhstaller
概要	Organic light-emitting diodes (OLEDs) rely on the use of functional materials with suitable energy levels and mobilities for selective charge carrier injection and transport of one species only at the respective electrode. Until recently, however, the dipolar nature of many organic semiconductors has been largely ignored in this context. In particular, electron transports layers (ETLs) often exhibit spontaneous orientation polarization leading to interfacial charges that modify the electrical potential landscape inside a hetero-layer device. Here we demonstrate that the effect of polar ETLs can be simulated using the well-established Poisson and drift-diffusion formalism, if these interfacial charges are taken into account. Impedance spectroscopy is used in order to validate our approach and to characterize the polarity of the material. Finally, simulations allow to quantify the impact of polar ETLs on device performance.