期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 17, 页码 15741-15747出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b00181
关键词
2D material; intercalation; metal oxide; broadband absorption; photodetection
资金
- National Natural Science Foundation of China [11574119, 61775092, 11474364, 61229401, 21576301, 51290271]
- Science and Technology Project of Guangdong Province [2017B030314031]
- Science and Technology Program of Guangzhou [201804010143]
- Research Grants Council of Hong Kong [AoE/P-03/08, T23-407/13-N, AoE/P-02/12, 14207515, 14204616]
- CUHK Group Research Scheme
- Innovation and Technology Commission [ITS/088/17]
Defects engineering can broaden the absorption band of wide band gap van der Waals (vdW) materials to the visible or near-IR regime at the expense of material stability and photoresponse speed. Herein, we introduce an atomic intercalation method that brings the wide band gap vdW alpha-MoO3 for vis-MIR broadband optoelectronic conversion. We confirm experimentally that intercalation significantly enhances photoabsorption and electrical conductivity buts effects negligible change to the lattice structure as compared with ion intercalation. Charge transfer from the Sn atom to the lattices induces an optoelectrical change. As a result, the Sn-intercalated alpha-MoO3 shows room temperature, air stable, broadband photodetection ability from 405 nm to 10 mu m, with photoresponsivity better than 9.0 A W-1 in 405-1500 nm, similar to 0.4 A W-1 at 3700 nm, and 0.16 A W-1 at 10 mu m, response time of similar to 0.1 s, and peak D* of 7.3 X 10(7) cm Hz(0.5) W-1 at 520 nm. We further reveal that photothermal effect dominates in our detection range by real-time photothermal-electrical measurement, and the materials show a high temperature coefficient of resistance value of -1.658% K-1 at 300 K. These results provide feasible route for designing broadband absorption materials for photoelectrical, photothermal, or thermal-electrical application.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据