Krishnamurthi, Vaishnavi and Khan, Hareem and Ahmed, Taimur and Zavabeti, Ali and Tawfik, Sherif Abdulkader and Jain, Shubhendra Kumar and Spencer, Michelle J. S. and Balendhran , Sivacarendran and Crozier, Kenneth B. and Li, Ziyuan and Fu, Lan and Mohiuddin, Md and Low, Mei Xian and Shabbir, Babar and Boes, Andreas and Mitchell, Arnan and McConville, Christopher F. and Li, Yongxiang and Kalantar-Zadeh, Kourosh and Mahmood, Nasir and Walia, Sumeet (2020) Liquid-Metal Synthesized Ultrathin SnS Layers for High-Performance Broadband Photodetectors. Advanced Materials, 32 (45). 2004247-1-2004247-10. ISSN 0935-9648

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Atomically thin materials face an ongoing challenge of scalability, hampering practical deployment despite their fascinating properties. Tin monosulfide (SnS), a low-cost, naturally abundant layered material with a tunable bandgap, displays properties of superior carrier mobility and large absorption coefficient at atomic thicknesses, making it attractive for electronics and optoelectronics. However, the lack of successful synthesis techniques to prepare large-area and stoichiometric atomically thin SnS layers (mainly due to the strong interlayer interactions) has prevented exploration of these properties for versatile applications. Here, SnS layers are printed with thicknesses varying from a single unit cell (0.8 nm) to multiple stacked unit cells (approximate to 1.8 nm) synthesized from metallic liquid tin, with lateral dimensions on the millimeter scale. It is reveal that these large-area SnS layers exhibit a broadband spectral response ranging from deep-ultraviolet (UV) to near-infrared (NIR) wavelengths (i.e., 280-850 nm) with fast photodetection capabilities. For single-unit-cell-thick layered SnS, the photodetectors show upto three orders of magnitude higher responsivity (927 A W-1) than commercial photodetectors at a room-temperature operating wavelength of 660 nm. This study opens a new pathway to synthesize reproduceable nanosheets of large lateral sizes for broadband, high-performance photodetectors. It also provides important technological implications for scalable applications in integrated optoelectronic circuits, sensing, and biomedical imaging.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Wiley.
Subjects: Chemistry
Materials Science
Applied Physics/Condensed Matter
Nanoscience/ Nanotechnology
Depositing User: Mr. Yogesh Joshi
Date Deposited: 22 Mar 2022 11:33
Last Modified: 22 Mar 2022 11:33

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