| 초록 |
Organic photodetectors have attracted interest owing to tunable optical properties, lightweight components, and cost-effective fabrication process. Since the organic semiconductors show excellent mechanical properties, flexible and curved design of photodetector is realized. For high performance photodetector, the dark current minimization is required, in addition to enhancing photocurrent, which affects figure-of-merits (the specific detectivity and the signal-to-noise ratio) Herein, we investigate a dark current characteristic depending on electron acceptor materials. Since the dark current calculated by traditional diode equation is significantly lower than the experimental dark current, we predicted that the dark current would be affected by factors other than heat-activated electrons. Moreover, we observed energy levels of each material related with charge injection. |
