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Templated‐Construction of Hollow MoS2 Architectures with Improved Photoresponses
Advanced Science ( IF 14.3 ) Pub Date : 2020-10-15 , DOI: 10.1002/advs.202002444
Chao Gao 1, 2 , Yingdong Han 3 , Kun Zhang 1 , Tian Wei 1 , Zhang Jiang 1 , Yang Wei 1 , Lisha Yin 1 , Fabio Piccinelli 4 , Cheng Yao 5 , Xiaoji Xie 1 , Marco Bettinelli 4 , Ling Huang 1
Affiliation  

Despite the outstanding optoelectronic properties of MoS2 and its analogues, synthesis of such materials with desired features including fewer layers, arbitrary hollow structures, and particularly specifically customized morphologies, via inorganic reactions has always been challenging. Herein, using predesigned lanthanide‐doped upconversion luminescent materials (e.g., NaYF4:Ln) as templates, arbitrary MoS2 hollow structures with precisely defined morphologies, widely variable dimensions, and very small shell thickness (≈2.5 nm) are readily constructed. Most importantly, integration of the near‐infrared‐responsive template significantly improves the photoresponse of up to 600 fold in device made of NaYF4:Yb/Er@MoS2 compared with that of MoS2 nanosheets under 980 nm laser illumination. Multichannel optoelectronic device is further fabricated by simply changing luminescent ions in the template, e.g., NaYF4:Er@MoS2, operating at 1532 nm light excitation with a 276‐fold photoresponse enhancement. The simple chemistry, easy operation, high reliability, variable morphologies, and wide universality represent the most important advantages of this novel strategy that has not been accessed before.

中文翻译:


具有改进光响应的中空 MoS2 结构的模板化构建



尽管MoS 2及其类似物具有出色的光电特性,但通过无机反应合成具有所需特征(包括更少的层数、任意空心结构以及特别定制的形貌)的此类材料始终具有挑战性。在此,使用预先设计的镧系元素掺杂上转换发光材料(例如NaYF 4 :Ln)作为模板,可以轻松构建具有精确定义的形貌、广泛可变的尺寸和非常小的壳厚度(约2.5 nm)的任意MoS 2中空结构。最重要的是,在 980 nm 激光照射下,与 MoS 2纳米片相比,近红外响应模板的集成显着提高了由 NaYF 4 :Yb/Er@MoS 2制成的器件的光响应高达 600 倍。通过简单地改变模板中的发光离子(例如NaYF 4 :Er@MoS 2 )进一步制造多通道光电器件,在1532 nm光激发下工作,光响应增强276倍。化学简单、操作方便、可靠性高、形态多样和广泛的通用性代表了这种新策略的最重要的优势,这是以前从未有过的。
更新日期:2020-11-19
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