|
NOGUCHI Yutaka
Department Undergraduate School , School of Science and Technology Position Professor |
|
| Language | English |
| Publication Date | 2021/07 |
| Type | Book |
| Invitation | Invited paper |
| Title | Organic Semiconductors for Optoelectronics |
| Contribution Type | Co-authored (first author) |
| Journal Type | Another Country |
| Publisher | John Wiley & Sons Ltd. |
| Volume, Issue, Page | pp.273-293 |
| Responsible for | Chapter 11. Spontaneous Orientation Polarization in Organic Light-Emitting Diodes and its Influence on Charge Injection, Accumulation, and Degradation Properties |
| Authorship | Lead author,Corresponding author |
| International coauthorship | International coauthorship |
| Author and coauthor | Yutaka Noguchi, Hisao Ishii, Lars Jäger, Tobias D. Schmidt, Wolfgang Brütting |
| Details | 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. |