A flexible ultraviolet photodetector based on single crystalline MoO3 nanosheets
A flexible ultraviolet photodetector based on single crystalline MoO3 nanosheets
复制标题
基于单晶MoO3纳米片的柔性紫外光电探测器
DOI：
10.1039/c5tc00850f
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发表时间：
2015-07
影响因子：
6.4
通讯作者：
Haili Gao
中科院分区：
文献类型：
--
作者：
Qinghong Zheng;Jin Huang;Shilin Cao;Haili Gao
采用无衬底物理气相沉积方法制备了禁带宽度为3.28 eV的二维正交结构MoO_3单晶带。超薄的MoO_3纳米片从传送带上剥离并转移到聚对苯二甲酸乙二酯基片上。制备了一种基于单晶MoO_3纳米片的柔性紫外光探测器，并对其光电响应特性进行了详细的研究。UVPD具有183mW−1的高响应度、2个数量级以上的高开关比和1 S以下的响应速度，并且在不同的机械变形下表现出良好的稳定性和重复性。出色的工作特性使UVPD成为可穿戴式紫外线计、触摸传感器面板、通信设备和UV成像相机的潜在候选者。
Large scale two dimensional orthorhombic structured MoO3 single crystalline belts with a bandgap of 3.28 eV were prepared by substrate-free physical vapor deposition. Ultra-thin MoO3 nanosheets were exfoliated from the belt and transferred to a polyethylene terephthalate substrate. A flexible ultraviolet photodetector (UVPD) based on the single crystalline MoO3 nanosheet was fabricated, and its optoelectronic response properties were investigated in detail. The UVPD has a high responsivity of 183 mA W−1, a high on/off ratio of over two orders and a response speed below 1 s. Moreover, the flexible UVPD exhibits excellent stability and reproducibility under different mechanical deformations. The excellent operating characteristics make the UVPD a potential candidate for wearable UV meters, touch sensor panels, communication devices and UV imaging cameras.
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