Thickness Tunable Wedding-Cake-like MoS2 Flakes for High-Performance Optoelectronics
Thickness Tunable Wedding-Cake-like MoS2 Flakes for High-Performance Optoelectronics
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用于高性能光电器件的厚度可调的婚礼蛋糕状 MoS2 薄片
DOI：
10.1021/acsnano.9b00277
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发表时间：
2019
期刊：
影响因子：
17.1
通讯作者：
Zhang Yanfeng
中科院分区：
文献类型：
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作者：
Yang Pengfei;Zhang Zhepeng;Sun Mengxing;Lin Feng;Cheng Ting;Shi Jianping;Xie Chunyu;Shi Yuping;Jiang Shaolong;Huan Yahuan;Liu Porun;Ding Feng;Xiong Chunyang;Xie Dan;Zhang Yanfeng
原子薄过渡金属二硫属化物（TMDC）由于其典型的厚度相关光学和电子特性以及在光电子学中的相关应用而引起了人们的极大兴趣。然而，此类材料的大规模、厚度可调的生长仍然具有挑战性。在此，我们报告了厚度可调的婚礼蛋糕状 MoS2 薄片在 6 英寸上的快速生长。使用 NaCl 涂层的 Mo 箔作为金属前体制备钠钙玻璃。通过控制 NaCl 促进剂的浓度，将 MoS2 厚度从一层 (1L) 调整到 >20L。为了证明超高的晶体质量，基于1L多层MoS2横向结的相关器件已被构建，并表现出相对较高的整流比（∼103）和超高的光响应性（∼104A/W）。由于尺寸可扩展、薄片均匀分布和均匀的光学特性，还展示了其在紫外线 (UV) 辐射过滤眼镜中的应用。因此，我们的工作应该推动层控制 TMDC 材料的可扩展生产及其光学和光电应用。
Atomically thin transition-metal dichalcogenides (TMDCs) have received substantial interest due to their typical thickness-dependent optical and electronic properties and related applications in optoelectronics. However, the large-scale, thickness-tunable growth of such materials is still challenging. Herein, we report a fast growth of thickness-tunable wedding-cake-like MoS2flakes on 6-in. soda-lime glass by using NaCl-coated Mo foils as metal precursors. The MoS2thicknesses are tuned from one layer (1L) to >20L by controlling the concentrations of NaCl promoter. To attest to the ultrahigh crystal quality, related devices based on 1L–multilayer MoS2lateral junctions have been constructed and display a relatively high rectification ratio (∼103) and extra high photoresponsitivity (∼104A/W). Thanks to the scalable sizes, uniform distributions of the flakes and homogeneous optical properties, the applications in ultraviolet (UV) irradiation filtering eyewear are also demonstrated. Our work should hereby propel the scalable production of layer-controlled TMDC materials as well as their optical and optoelectrical applications.