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	2021/07
形態種別	著書
招待論文	招待あり
標題	Organic Semiconductors for Optoelectronics
執筆形態	共著(筆頭者)
掲載区分	国外
出版社・発行元	John Wiley & Sons Ltd.
巻・号・頁	pp.273-293
担当範囲	Chapter 11. Spontaneous Orientation Polarization in Organic Light-Emitting Diodes and its Influence on Charge Injection, Accumulation, and Degradation Properties
担当区分	筆頭著者,責任著者
国際共著	国際共著
著者・共著者	Yutaka Noguchi, Hisao Ishii, Lars Jäger, Tobias D. Schmidt, Wolfgang Brütting
概要	This chapter presents the relations between spontaneous orientation polarization (SOP) and the charge carrier dynamics as well as degradation properties in organic light-emitting diodes (OLEDs), particularly focusing on the interface properties. The interface charge model describes how SOP affects the charge injection and accumulation behavior. The polarization charge may enhance the carrier injection from the electrode. The chapter discusses these issues. It shows the electron injection property of bilayer devices incorporating a polar film at the cathode side. The chapter also shows degradation mechanisms of a phosphorescent OLED incorporating a polar film as an electron transport layer, studied by a combination of time resolved electroluminescence spectroscopy and displacement current measurement. Controling SOP based on the molecular design would be an important issue to improve device performance and exploit innovative functions of organic semiconductors.