Formation of self-assembled higher-order structures of colloidal semiconductor quantum dots and their anisotropic photovoltaic properties

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K15111
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 28010:Nanometer-scale chemistry-related
• Research Institution: Yamagata University (2021-2022); Institute of Physical and Chemical Research (2020)
• Principal Investigator: Enomoto Kazushi 山形大学, 大学院基盤教育機構, 助教 (50823556)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 量子ドット / 低次元配列

Outline of Final Research Achievements

We found that cadmium sulfide quantum dots formed a gel in the presence of dicadmium tetraolate in hydrophobic media. The factors of gelation were elucidated from various measurements and analyses. The assembly state of CdS quantum dots in the gel was clarified by electron microscopy observations. Viscoelasticity measurements revealed that CdS quantum dots exhibit a quick structural repair ability. One-dimensional long-range ordered structures of colloidal quantum dots with several hundred micrometers were successfully formed by electrospinning method.

Free Research Field

ナノ材料化学

Academic Significance and Societal Importance of the Research Achievements

本研究では、コロイド量子ドットゲルを作製し、コロイド量子ドットの一次元長周期構造の形成に成功している。本成果によって見出されたコロイド量子ドットの低次元配列の新規手法は、量子細線を用いた様々な光・電子デバイス、情報デバイスへの応用が期待される。また、素早い構造修復能力を利用した紡糸手法はコロイド量子ドットのみならず、様々なコロイド無機ナノ微粒子の長周期低次元配列への応用が可能となると考えられる。