Elucidation of electronic structure and charge generation mechanism at photoelectric conversion disordered interface

2016 Fiscal Year Final Research Report

• Project/Area Number: 15H06636
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Device related chemistry
• Research Institution: Tokyo University of Science
• Principal Investigator: Akaike Kouki 東京理科大学, 理工学部物理学科, 助教 (90581695)
• Project Period (FY): 2015-08-28 – 2017-03-31
• Keywords: 有機半導体界面 / 光電子分光 / 有機太陽電池

Outline of Final Research Achievements

In this research, we tried to elucidate how interface structure impacts energy structure at organic heterojunctions. We found at first that the orientation of side chain f PC61BM, which is the acceptor material for organic photovotalics (OPVs), drastically changes upon crystallization of PC61M thin film. 6T film on the PC61BM exhibits wider terraces that that on as-coated PC61BM film due to the increased surface energy. We also found that F16CuPc/6T interface, where both materials are crystalline, has significant disordering/intermixing upon the interface formation, which revealed by X-ray diffraction and scanning tunneling microscopy. That observation reasonably explains the origin of the complex energy level alignment at the donor/acceptor interface.

Free Research Field

界面電子物性