| 초록 |
Organic halide perovskites have emerged as attractive materials for use in optoelectronic devices. However, the presence of traps may cause charge recombination at the surface or grain boundaries of perovskite, and reducing them has been identified as an important strategy for improving device performance. Here, we report on inserting graphene quantum dots (GQDs) in the perovskite film in order to induce ligand-assisted trap healing within the film. Additionally, by optimizing the ligands on the GQDs, we were also able to observe improved charge extraction efficiency. As a result, we fabricated perovskite photodetector devices using the GQDs-inserted perovskite films and found that the defect passivation and improved electron extraction led to improved detectivity and faster response speed. |
