Colloidally synthesized and bandgap-engineered luminescent titanium nitride quantum dots

IF 5.1 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale Pub Date : 2025-10-02 DOI:10.1039/d5nr03290c

Aswathi Maladan, Takuya Okamoto, Mohit Kumar, Most Farida Khatun, Yasutaka Matsuo, Ch Subrahamayam, Vasudevanpillai Biju

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引用次数: 0

Abstract

Semiconductor nanomaterials, such as cadmium, lead, and mercury chalcogenides, as well as lead halide perovskites, exhibit excellent optical, electronic, photonic, and photovoltaic properties, making them promising for applications in solar cells, LEDs, and X-ray photodetectors. However, heavy metals, such as Cd, Hg, and Pb, raise concerns about the use of these nanomaterials in devices and the recycling and disposal of such devices. Therefore, developing greener luminescent materials is crucial for sustainable optoelectronic and photovoltaic technologies. We report a colloidal chemical method for engineering brilliantly luminescent titanium nitride (TiN) quantum dots showing tunable optical bandgap (1.8~2.2 eV) and multicolor photoluminescence. We demonstrate the TiN quantum dot structure and properties using HRTEM, SEM-EDX, XRD, XPS, Raman spectroscopy, and steady-state and time-resolved fluorescence spectroscopy, confirming their size, morphology, chemical composition, crystalline structure, bandgap, and luminescence properties. This research presents luminescent TiN quantum dots as promising substitutes for metal chalcogenides and lead halide perovskites in sustainable electrooptical and photovoltaic technologies.

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胶体合成和带隙工程的发光氮化钛量子点

半导体纳米材料，如镉、铅和汞硫族化合物，以及卤化铅钙钛矿，表现出优异的光学、电子、光子和光伏特性，使它们在太阳能电池、led和x射线光电探测器中应用前景广阔。然而，重金属，如Cd、Hg和Pb，引起了人们对这些纳米材料在器件中的使用以及这些器件的回收和处置的关注。因此，开发绿色发光材料对于可持续光电和光伏技术至关重要。本文报道了一种胶体化学方法，用于工程制备具有可调谐光学带隙（1.8~2.2 eV）和多色光致发光的亮发光氮化钛（TiN）量子点。我们利用HRTEM， SEM-EDX， XRD， XPS，拉曼光谱，稳态和时间分辨荧光光谱等方法对TiN量子点的结构和性能进行了验证，确定了它们的尺寸，形态，化学成分，晶体结构，带隙和发光性能。该研究提出了发光TiN量子点作为金属硫族化合物和卤化铅钙钛矿在可持续光电和光伏技术中的有前途的替代品。

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来源期刊

Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

12.10

自引率

3.00%

发文量

1628

审稿时长

1.6 months

期刊介绍： Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.