Study on Photoelectric Conversion System by utilizing Localized Enhanced Photo Field

2014 Fiscal Year Final Research Report

• Project/Area Number: 26620188
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Inorganic industrial materials
• Research Institution: Hokkaido University
• Principal Investigator: MURAKOSHI Kei 北海道大学, 理学(系)研究科(研究院), 教授 (40241301)
• Co-Investigator(Renkei-kenkyūsha): YASUDA Satoshi 北海道大学, 大学院理学研究院, 准教授 (90400639)
• Project Period (FY): 2014-04-01 – 2015-03-31
• Keywords: 光電変換 / プラズモン / 電気化学 / 金属ナノ構造 / 量子ドット

Outline of Final Research Achievements

Study on reaction mechanism of plasmonic photo conversion electrode system utilizing localized enhanced photo field was conducted. Using scanning electron microscopy, poly-pyrrole formation on Titanium dioxide electrode (TiO2) with Au nano structures induced by the localized enhanced photo field was evaluated to identify the reaction site. The results showed that the reaction site is located around the enhanced photo field, and the characteristics of the reactivity could be elucidated.
Plasmonic enhancement on the photoelectrochemial response was also studied using PbS quantum dots (PbS-QDs) on TiO2 electrode with Au nanoparticles (Au-NPs). Enhanced photo-electrochemical response of Q-PbS was observed at relatively wide wavelength region between visible and near infrared. Furthermore, a coating TiO2 layer to PBs-QDs/Au-NPs electrode found the enhancement of photo conversion efficiency, suggesting the inhabitation of electron quenching effect.

Free Research Field

電気化学