Manipulation of the charge carrier dynamics at organic-molecule/metal-oxide interfaces by molecular dipole moment

2015 Fiscal Year Final Research Report

• Project/Area Number: 25410085
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Functional solid state chemistry
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Ozawa Kenichi 東京工業大学, 理工学研究科, 助教 (00282822)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 有機－酸化物接合界面 / エネルギー準位接続 / 双極子モーメント / キャリアダイナミクス / 光電子分光 / X線吸収分光 / core-hole clock分光 / 有機太陽電池

Outline of Final Research Achievements

Effect of dipole moments of organic molecules on the transfer time of excited charge across molecule/metal-oxide junctions has been verified. Photoelectron spectroscopy, X-ray absorption spectroscopy and core-hole clock spectroscopy were utilized to examine the properties of the junctions between shuttle cock-type phthalocyanine films and strontium titanate surfaces. The charge transfer time from phthalocyanine to the oxide surface tends to be shorter if phthalocyanine has a larger dipole moment. However, the interaction strength and the energy-level alignment at the interface affect more drastically the transfer time.

Free Research Field

表面科学