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Alsaif, Manal M. Y. A.; Kuriakose, Sruthi; Walia, Sumeet; Syed, Nitu; Jannat, Azmira; Zhang, Bao Yue; Haque, Farjana; Mohiuddin, Md; Alkathiri, Turki; Pillai, Naresh; Daeneke, Torben; Ou, Jian Zhen; Zavabeti, Ali
Advanced materials interfaces, April 9, 2019, Letnik: 6, Številka: 7Journal Article
Heterostructures assembled from atomically thin materials have led to a new paradigm in the development of the next‐generation high‐performing functional devices. However, the construction of the ultrathin van der Waals (vdW) heterostructures is challenging and/or limited to materials with layered crystal structures. Herein, liquid metal vdW transfer method is used to construct large area heterostructures of atomically thin metal oxides of p‐SnO/n‐In2O3 with ease. The heterostructure exhibits both outstanding photodetectivity of 5 × 109 Jones and photoresponsivity of 1047 A W−1 with fast response time of ≤1 ms under illumination of the 280 nm light. Such excellent performances are due to the formation of the narrow bandgap of the staggered gap at the p–n junction produced by the high‐quality SnO/In2O3 heterostructure. The facile production of high‐quality vdW heterostructures using the liquid metal–based method therefore provides a promising pathway for realizing future optoelectronic devices. This work illustrates a framework for the development of van der Waals (vdW) heterostructures using atomically thin surface oxides of the low melting point liquid metals. vdW heterostructures that are made from printing surface oxides of liquid indium (In2O3) and tin (SnO) on top of each other have efficient and fast response features for photodetection.
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in: SICRIS
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