半導体ナノ結晶に生成する多励起子の有効活用

抄録

Semiconductor nanocrystals, also known as quantum dots (QD), can generate multiple excitons in a single QD. Thanks to their higher photostability and larger absorption cross-section compared to typical organic molecules, QDs are considered promising candidates for efficient light-harvesting materials. However, the multiple excitons generated in QDs interact with each other and annihilate through a process known as Auger recombination. As a result, the utilization of the multiple excitons is limited by Auger recombination. In this review, we introduce approaches to overcome the limitation, focusing on enhancing multiphoton emission from the multiple excitons by plasmonic effects and extracting multiple excitons through energy transfer to surface-bound organic molecules.