Stability promoted close-packed quantum dot-AlPO4 glass films with tunable and bimodal luminescence
Stability promoted close-packed quantum dot-AlPO4 glass films with tunable and bimodal luminescence
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DOI：
10.1016/j.jnoncrysol.2015.04.021
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发表时间：
2016
影响因子：
3.5
通讯作者：
Yan Wang;Jin He;Rihong Li;Siyuan Chen;Xinqiang Yuan;Long Zhang
中科院分区：
文献类型：
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作者：
Yan Wang;Jin He;Rihong Li;Siyuan Chen;Xinqiang Yuan;Long Zhang
可调谐多发射PbS量子点在通信、微电子和太阳能电池等领域有着广泛的应用。在这里，我们提出了一个简单而实用的方法来创建量子点系统在多孔AlPO 4玻璃薄膜矩阵。采用逐层组装的方法制备了不同尺寸PbS量子点的近红外可调谐和双峰发光薄膜。原子力显微镜和扫描电子显微镜显示了QD-AlPO 4玻璃薄膜的成功沉积和均匀的表面形貌。此外，由于AlPO 4基底孔隙的吸附和限制，QD-AlPO 4玻璃薄膜的光稳定性得到了显著改善。沉积到基质上后量子点光致发光光谱的红移以及不同尺寸量子点之间的能量转移表明形成了密堆积的量子点固体系统。这一工作拓展了量子点密排体系的研究，对量子点混合体系在宽调谐光学器件和通信领域的应用具有重要意义。
Broadly tunable and multi-emission PbS quantum dot (QD)-solid systems have drawn great attention to the applications of telecommunication, microelectronics and solar cells. Here, we propose a simple and practical method for creation of QD-systems in porous AlPO4glass film matrix. Tunable and bimodal luminescent films in near infrared are achieved by a layer by layer assembly method with PbS QDs of different sizes. Atomic force microscopy and scanning electron microscopy reveal the successful deposition and homogeneous surface morphology of QD-AlPO4glass films. Furthermore, as a result of adsorption and confinement from pores of AlPO4substrate, the photostability of QD-AlPO4glass films is dramatically improved. The red-shift of QD photoluminescence spectra after depositing onto the matrix and the energy transfer between QDs of different sizes indicate the formation of close-packed QD solid systems. This work extends the research in QD close-packed systems and has important implications for the applications of blended QDs in broadly tunable optical devices and telecommunication.