Investigation of photo-physical properties of semiconductor quantum dot superlattices by systematic controlling the transfer integral

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K23654
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0502:Inorganic/coordination chemistry, analytical chemistry, inorganic materials chemistry, energy-related chemistry, and related fields
• Research Institution: Kwansei Gakuin University
• Principal Investigator: Eguchi Daichi 関西学院大学, 理工学部, 助教 (50844677)
• Project Period (FY): 2019-08-30 – 2021-03-31
• Keywords: ダイヤモンドアンビルセル / 量子ドット

Outline of Final Research Achievements

Semiconductor quantum dot superlattices (QDSLs) have the potential for high efficiency solar cells due to the emergence of various photo-physical properties. However, because of the difficulty in the systematic control of the interaction between QDs, the photo-physical properties of QDSLs are still unclear. In this work, I established the basis for systematically controlling the interaction between the QDs by using a diamond anvil cell and measuring the photo-physical properties (pico-second photoluminescence decay). Based on this work, elucidation of photo-physical properties of QDSLs will be performed by constructing new optical systems (femto-second transient absorption measurement).

Free Research Field

ナノ材料化学

Academic Significance and Societal Importance of the Research Achievements

本成果の学術的意義として、半導体量子ドット超格子 (QDSLs) のQDs間の相互作用の系統的な制御を指向した光学系の構築が挙げられる。この研究には、『ダイヤモンドアンビルセルを用いた高圧の科学』と『時間分解測定を行う光学系構築』といった専門分野を融合させる必要があったため、これまで研究が進んでこなかったが、本研究成果では上記を融合させることができた。これにより、未解明な点が残されているQDSLsの光物性を解明することができる。