Analysis of carrier transport and polarization in organic films as dielectric phenomena by using MDC and SHG, and its application to organic device characterization

2014 Fiscal Year Final Research Report

• Project/Area Number: 22226007
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Research Field: Electronic materials/Electric materials
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: IWAMOTO Mitsumasa 東京工業大学, 理工学研究科, 教授 (40143664)
• Co-Investigator(Kenkyū-buntansha): MANAKA Takaaki 東京工業大学, 大学院理工学研究科, 准教授 (20323800) ; TAGUCHI Dai 東京工業大学, 大学院理工学研究科, 助教 (00531873)
• Project Period (FY): 2010-04-01 – 2015-03-31
• Keywords: 誘電分極 / 分極構造評価 / キャリア輸送 / 電界分布 / 光第２次高調波 / マックスウェル変位電流 / 界面膜 / ドメイン形状

Outline of Final Research Achievements

We proposed a novel method for analyzing behaviors of dipoles and electrons in organic materials, on paying attention to dielectric polarization phenomena due to dipoles and electrons. Maxwell Displacement Current (MDC) allows us to directly probe orientational motion of dipoles in monolayers, while electric field induced optical second harmonic generation (EFISHG) measurement allows dynamical electron and hole transport in solids to be probed directly. Experiments making use of time-resolved EFISHG technique reveals carrier transport phenomena in organic devices, and thus enables us to model the carrier transport mechanism. By using optical second harmonic generation technique, we visualized and analyzed lipid Langmuir monolayers on focusing the shape and polarization structure of the domains of the monolayers. Observed polar structure is well supported by the solution of shape equation.

Free Research Field

誘電体物性工学