| 초록 |
Graphene-based photodetectors have received considerable attention because their spectral bandwidths are broad compared to those of semiconductor-based photoetectors. However, the weak light absorption of the atomically thin graphene layer and the very low gain mechanisms have limted key properties that are needed for high-performance photodetectors, including the quantum efficiency, responsivity, and noise equivalent power. A number of dyes have been discovered from nature and prepared by simple synthetic process. They have been applied to dyeing fabrics and laser manufacturing. We expect that the combination of graphene, which features a remarkably broad absorption band, and dye molecules which gave a high absorption cross-section, provided a very large photocurrent, an ultrahigh quantum efficiency |
