| 초록 |
Recently, quantum dots (QDs) have often garnered significant attention and employed for various applications. Nevertheless, most of the conventional devices utilize a glass substrate and/or brittle substrate, which is not compatible with next-generation wearable electronics. A suitable method for devising conductive and flexible free-standing platform that can be combined with various kinds of QDs is thus in a great need for next-generation wearable electronics. In this work, we introduce a universal and simple method to coat QDs on carbon nanofiber (CNF) by dip-coating process, where many kinds of QDs can be well decorated on the surface of CNF. As one potential application among many, QD-coated CNF was examined for their photodetector performance and it has been found that CdSe QD-coated CNF presents improved augmentation of photocurrent with respect to dark current by 11% compared to 6% of bare CNF. Additionally, it shows fast response rising and falling times as 15 msec and 9 msec, respectively. When other QD-coated CNFs, such as PbS, InP, CuInS2 QDs, were applied for the photodetector, their photosensitivities were also improved. This is an early report on fabricating various kinds of QD-coated CNFs, which can be extended to a myriad set of applications. |
