Wei Haitao, Lv Bowen, Zhang Mengya, Zhang Xiangzhe, Yan Xingheng, Cai Junhao, Yang Yaping, Yu Tongcheng
College of Advanced Interdisciplinary Study, National University of Defense Technology, Changsha 410073, China.
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China.
Int J Mol Sci. 2025 Apr 8;26(8):3480. doi: 10.3390/ijms26083480.
The near-infrared photodetection of monolayer MoS can be achieved using upconverted nanoparticles (UCNPs). Herein, we demonstrated that gold nanorods (Au NRs) further enhanced the near-infrared photoresponsivity of a hybrid device via the surface plasmon enhancement of the localized field. We synthesized a three-layer device comprising Au NRs, UCNPs (NaYF:Yb, Er), and monolayer MoS, and examined its photoelectric characteristics using laser irradiation with varying power densities at 980 nm, the excitation wavelength of UCNPs. Compared with a device without Au NRs, the photoelectric response of the three-layer device was greatly improved at 5 V bias, and photoresponsivity was increased at visible wavelengths (450, 532, and 635 nm). This study contributes to the knowledge of two-dimensional materials for the development of hybrid photoelectronic devices.
使用上转换纳米粒子（UCNPs）可以实现单层MoS的近红外光探测。在此，我们证明了金纳米棒（Au NRs）通过局部场的表面等离子体增强进一步提高了混合器件的近红外光响应性。我们合成了一种由Au NRs、UCNPs（NaYF:Yb, Er）和单层MoS组成的三层器件，并使用980 nm（UCNPs的激发波长）不同功率密度的激光照射来研究其光电特性。与没有Au NRs的器件相比，三层器件在5 V偏压下的光电响应大大提高，并且在可见光波长（450、532和635 nm）下光响应性增加。这项研究有助于了解二维材料在混合光电器件开发方面的知识。
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