A joint research group led by Professor Kazuhiko Hirakawa and Professor Kenji Shibata at Tohoku Institute of Technology has fabricated a single electron transistor (SET) using a single semiconductor colloidal quantum dot, and succeeded in detailed evaluation of the electrical conduction of a single colloidal quantum dot as well as the first successful room temperature operation of the SET, which was previously difficult. 2023 Colloidal quantum dots, which are the subject of a Nobel Prize in Chemistry, have attracted much attention in recent years as photovoltaic devices such as solar cells, but there has been little research on their electrical properties and many problems remain to be clarified. The joint research, which includes Associate Professor Tomohiro Otsuka of Tohoku University, Associate Professor Satria Bisri of Tokyo University of Agriculture and Technology, and Professor Yoshihiro Iwasa of the University of Tokyo and Team Leader of the RIKEN Center for Emergent Matter Science, will not only contribute to the application of semiconductor colloidal quantum dots to photovoltaic devices, but also to new quantum information devices. The resulting paper was published in the British scientific journal “Nature Communications” on November 18.
[Link]