Microwave-Assisted Synthesis of MnSeTe Nanocomposite Flowers for Optoelectronic and Photoresponse Applications

IF 5.3 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Subhashree Das, Subrata Senapati*, Rajamanickam Ganesan and Ramakanta Naik*, 
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Abstract

The tuning of optical, morphological, and structural properties through precise control of the size/thickness of transition-metal chalcogenide is one of the key aspects for practical applications. The present study reports that the microwave-synthesized MnSe1+xTe1–x (MST) nanocomposite by altering Se and Te concentrations is studied for optoelectronic applications. The gradual increase in its crystallinity through MnSe and MnTe2 crystalline phases with an increase in Se/Te ratio is confirmed by the structural study. The existence of different vibrational modes in the sample with alteration in the microstructural region is confirmed by a Raman study. The morphology study shows the nanosheet (nSh) structure as formed for the as-prepared MST samples, confirming the formation of 2D nanomaterial. The nSh thickness gradually decreased with a decrease in the Se concentration and increased Te. The reduction of the optical band gap of nSh is reflected by shifting the absorption edge to a higher wavelength regime. The refractive index values lie between 2.14 and 2.78 for different MST nSh as per theoretical calculation. The presence of various exothermal and endothermal peaks is confirmed by thermal analysis for the present sample. These materials undergo photodetection measurement, where they illustrate commendable responsivity across a range of values: 1.73, 8.88, and 28.88 nA W–1. Additionally, these materials showcase detectivity at levels of 1.14 × 1010, 2.52 × 1010, and 3.96 × 1011 Jones, respectively. The changes in different optical and structural parameters enable the material’s applicability in optoelectronic devices.

Abstract Image

微波辅助合成用于光电和光响应应用的 MnSeTe 纳米复合花
通过精确控制过渡金属卤化物的尺寸/厚度来调整其光学、形态和结构特性是实际应用的关键之一。本研究通过改变 Se 和 Te 的浓度,研究了微波合成的 MnSe1+xTe1-x (MST)纳米复合材料的光电应用。结构研究证实,随着 Se/Te 比例的增加,MnSe 和 MnTe2 结晶相的结晶度逐渐增加。拉曼研究证实,随着微结构区域的变化,样品中存在不同的振动模式。形貌研究显示,制备的 MST 样品形成了纳米片(nSh)结构,证实了二维纳米材料的形成。随着 Se 浓度的降低和 Te 浓度的增加,nSh 厚度逐渐减小。nSh 光带隙的减小反映在吸收边沿向高波长区移动。根据理论计算,不同 MST nSh 的折射率值介于 2.14 和 2.78 之间。热分析证实了本样品存在各种放热和内热峰。对这些材料进行了光电探测测量,结果表明它们的响应度在一定范围内值得称赞:1.73、8.88 和 28.88 nA W-1。此外,这些材料的探测率分别为 1.14 × 1010、2.52 × 1010 和 3.96 × 1011 琼斯。不同光学和结构参数的变化使这些材料能够应用于光电设备。
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来源期刊
CiteScore
8.30
自引率
3.40%
发文量
1601
期刊介绍: ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.
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