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NOGUCHI Yutaka
Department Undergraduate School , School of Science and Technology Position Professor |
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| Language | English |
| Publication Date | 2023/08 |
| Type | Academic Journal |
| Peer Review | Peer reviewed |
| Title | Light-Emitting Electrochemical Cells Based on Nanogap Electrodes |
| Contribution Type | Co-authored (other than first author) |
| Journal | Nano Letters |
| Journal Type | Another Country |
| Publisher | American Chemical Society |
| Total page number | 7 |
| Authorship | Last author,Corresponding author |
| Author and coauthor | Ryo Yonemoto, Rieko Ueda, Akira Otomo, Yutaka Noguchi |
| Details | 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 |