Large-area flexible photodetector based on atomically thin MoS2/graphene film
Large-area flexible photodetector based on atomically thin MoS2/graphene film
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DOI：
10.1016/j.matdes.2018.05.017
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发表时间：
2018-09-15
影响因子：
8.4
通讯作者：
Liao, Guanglan
中科院分区：
文献类型：
--
作者：
Sun, Bo;Shi, Tielin;Liao, Guanglan
在本文中，我们展示了一个大面积的灵活的光电探测器的基础上垂直堆叠的原子级薄的二硫化钼/石墨烯薄膜。MoS_2薄膜采用CVD法生长。通过精确控制管式炉中的气氛和温度，实现了几平方毫米的连续单层MoS 2薄膜的生长。在实验中，将MoS 2和石墨烯薄膜依次转移到PET基底上。采用PEO和LiClO 4组成的聚合物电解质制备了侧栅柔性光电探测器。该器件在低工作电压下表现出高性能。在入射功率为60 μ W（520 nm）时，V-gs =-1V，V-ds = 1V，外部响应度约为3.5A/W。值得注意的是，异质结构在520 nm处的透射率仅为10.5%左右，内部响应度甚至达到33.3 A/W左右，高于大多数基于纳米材料的柔性光电探测器。此外，该器件在瞬态开/关测试中显示出高稳定性。我们相信，MoS 2/石墨烯光电探测器将是一个有前途的候选人在柔性电子系统。此外，这种混合膜设计也是便携式的，对未来的光电探测器研究有意义。(c)2018由Elsevier Ltd.出版
In this paper, we demonstrate a large-area flexible photodetector based on vertically stacked atomically thin MoS2/graphene film. The MoS2 film is grown by CVD method. We have realized the growth of several square millimeter continuous monolayer MoS2 film via precisely control the atmosphere and temperature in the tube furnace. In experiment, the MoS2 and graphene film was transferred on PET substrate successively. Polymer electrolyte composed of PEO and LiClO4 was introduced to fabricate the side-gated flexible photodetector. The devices exhibit high performance at low operation voltage. External responsivity is about 3.5 A/W at V-gs = -1 V, V-ds = 1 V with incident power of 60 mu W (520 nm). Noteworthy is that the transmittance of the heterostructure at 520 nm is only about 10.5%, the internal responsivity even reaches to about 33.3 A/W, which is higher than most of the flexible photodetectors based on nanomaterials. Besides, the devices display high stability during transient on/off test. We believe the MoS2/graphene photodetector would be a promising candidate in flexible electronic system. Besides, such hybrid film design is also portable and meaningful for future photodetector investigation. (c) 2018 Published by Elsevier Ltd.