▎ 摘　　要

We explore energy transfer dynamics between quantum dots and graphene oxide composite by utilizing transient absorption spectroscopy. It is found that stimulated emission of quantum dots can be completely suppressed with graphene oxide reduced by laser irradiation. Absorption transition of defect state has decreased subsequently when graphene oxide is further reduced. It can be attributed to the enhanced energy transfer efficiency from quantum dots to photoreduced graphene oxide. Here, energy transfer dynamics between them have been manipulated efficiently, providing potential applications in the fields of optoelectronic devices, such as field effect transistors, light emitting diodes, and solar cells.