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首页> 外文期刊>Superlattices and microstructures >Concentration-dependent optical properties of TGA stabilized CdTe Quantum dots synthesized via the single injection hydrothermal method in the ambient environment
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Concentration-dependent optical properties of TGA stabilized CdTe Quantum dots synthesized via the single injection hydrothermal method in the ambient environment

机译：TGA稳定CdTe量子点在环境中通过浓度依赖的光学性质通过单次注入水热法合成

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摘要

Thioglycolic acid (TGA) stabilized aqueous CdTe Quantum dots (QDs) were synthesized using a facile, cost efficient Single Injection Hydrothermal (SIH) method. The complete preparation of precursors and growth of QDs was carried out in the ambient environment without inter gas protection. The Cadmium and Tellurium precursors were prepared from cadmium nitrate and elemental tellurium powder with sodium borohydride as reducing agent respectively. A systematic investigation was carried out in order to study the effect of 0.04M and 0.08M TGA concentration on ease synthesis, stability and size-tunable optical absorbance, bandgap, photoluminescence (PL) and Quantum yield (QY) of CdTe QDs. The Structure of QDs was verified by XRD and optical properties by absorbance and PL spectra. Experimental results revealed that the 0.08M TGA QDs possess good chemica] and optical stability with high luminescence and decent QY, ready to use in optoelectronics, photovoltaic and biological application.
机译：硫乙醇酸（TGA）稳定的CdTe水溶液量子点（QDs）使用简便，经济高效的单注入水热（SIH）方法合成。前体的完整制备和量子点的生长是在周围环境中进行的，没有内部气体保护。镉和碲的前体分别由硝酸镉和元素碲粉与硼氢化钠作为还原剂制备。为了研究0.04M和0.08M TGA浓度对CdTe量子点的易合成，稳定性和尺寸可调光吸收，带隙，光致发光（PL）和量子产率（QY）的影响，进行了系统的研究。通过XRD验证了QD的结构，并通过吸光度和PL光谱验证了光学特性。实验结果表明，0.08M TGA量子点具有良好的化学稳定性和光学稳定性，具有较高的发光度和良好的QY值，可用于光电，光伏和生物应用。

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