Investigation of the carrier transport process in organic photovoltaics

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03883
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Device related chemistry
• Research Institution: Osaka Prefecture University
• Principal Investigator: Kobayashi Takashi 大阪府立大学, 工学(系)研究科(研究院), 准教授 (10342784)
• Co-Investigator(Kenkyū-buntansha): 内藤 裕義 大阪府立大学, 工学(系)研究科(研究院), 教授 (90172254)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 有機薄膜太陽電池 / キャリア輸送 / 移動度 / 光誘導吸収 / 変調光電流測定

Outline of Final Research Achievements

To improve the solar conversion efficiency of organic photovoltaics, it is essential to reveal the operation mechanism, in particular, the carrier transport process. In this study, we develop spectroscopic techniques to determine the associated physical constants, such as the carrier drift mobility, carrier lifetime, and built-in potential, in photovoltaic devices. Photoinduced absorption spectroscopy reveals that the hole drift mobility can be selectively determined by applying a reverse bias to the photovoltaic device. We also establish a modulated photocurrent technique to simultaneously measure the electron and hole mobilities in a photovoltaic device. Using these techniques, we investigate the carrier transport process in organic photovoltaic devices fabricated with various conditions.

Free Research Field

有機エレクトロニクス