硫化铋量子点的制备及其发光性能

doi:10.12066/j.issn.1007-2861.1973

摘要/Abstract

摘要：

$Bi_{2}$$S_{3}$是环境友好的绿色材料.使用11-巯基十一烷酸作为形貌剂合成发光性能稳定的硫化铋量子点,其最大发射波长位于500 nm处,在空气中保存6个月以上发光性能保持不变. 在合成过程中,硫代乙酰胺水解产生的S$^{2-}$与乙酰丙酮配体的交换机理起到控制硫化铋成核速度的作用,并对$Bi_{2}$$S_{3}$晶核的形成有定向作用.11-巯基十一烷酸的巯基S原子与$Bi_{2}$$S_{3}$量子点表面的Bi$^{3+}$离子以Bi-S方式形成疏水层,使之能够稳定存在, 同时作为长链配体,可防止$Bi_{2}$$S_{3}$量子点粒子之间发生团聚现象.

关键词: 硫化铋, 量子点, 发光, 溶剂热法

Abstract:

Bismuth sulfide is considered as an environment-friendly material.Here, $Bi_{2}$$S_{3}$ quantum dots ($Bi_{2}$$S_{3}$ QDs) were synthesized with a new method using 11-mercaptounde-canoic acid as a capping agent. The $Bi_{2}$$S_{3}$ QDs showed stable properties over 6 months in the atmosphere. The maximum emission wavelength for $Bi_{2}$$S_{3}$ QDs was 500 nm. The ligand exchange process between S$^{2-}$ and acetylacetonate was a critical step in the synjournal of $Bi_{2}$$S_{3}$ QDs. Spherical cores of $Bi_{2}$$S_{3}$ were formed by the nuclei due to the orientation-directed effect of acetylacetonate. The Bi$^{3+}$ ions at the surfaces of $Bi_{2}$$S_{3}$ QDs were capped by 11-mercaptoundecanoic acid molecules that could efficiently stabilize the $Bi_{2}$$S_{3}$ QDs.

Key words: bismuth sulfide, quantum dots, luminescence, solvent-thermal method

中图分类号:

O628.3

安保礼, 朱小雅, 徐甲强. 硫化铋量子点的制备及其发光性能[J]. 上海大学学报(自然科学版), 2019, 25(2): 227-234.

AN Baoli, ZHU Xiaoya, XU Jiaqiang. Synjournal and luminescence properties of Bi$_{\textbf{2}}$S$_{\textbf{3}}$ quantum Dots[J]. Journal of Shanghai University（Natural Science Edition）, 2019, 25(2): 227-234.

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