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	2023/08
形態種別	学術雑誌
査読	査読あり
標題	Light-Emitting Electrochemical Cells Based on Nanogap Electrodes
執筆形態	共著(筆頭者以外)
掲載誌名	Nano Letters
掲載区分	国外
出版社・発行元	American Chemical Society
総ページ数	7
担当区分	最終著者,責任著者
著者・共著者	Ryo Yonemoto, Rieko Ueda, Akira Otomo, Yutaka Noguchi
概要	In a light-emitting electrochemical cell (LEC), electrochemical doping caused by mobile ions facilitates bipolar charge injection and recombination emissions for a high electroluminescence (EL) intensity at low driving voltages. We present the development of a nanogap LEC (i.e., nano-LEC) comprising a light-emitting polymer (F8BT) and an ionic liquid deposited on a gold nanogap electrode. The device demonstrated a high EL intensity at a wavelength of 540 nm corresponding to the emission peak of F8BT and a threshold voltage of ∼2 V at 300 K. Upon application of a constant voltage, the device demonstrated a gradual increase in current intensity followed by light emission. Notably, the delayed components of the current and EL were strongly suppressed at low temperatures (<285 K). The results clearly indicate that the device functions as an LEC and that the nano-LEC is a promising approach to realizing molecular-scale current-induced light sources.
DOI	10.1021/acs.nanolett.3c02001