InP Nanocrystals with Color-Tunable Luminescence by Microwave-Assisted Ionic-Liquid Etching
InP Nanocrystals with Color-Tunable Luminescence by Microwave-Assisted Ionic-Liquid Etching
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DOI：
10.1021/acs.chemmater.6b04457
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发表时间：
2017-03-14
影响因子：
8.6
通讯作者：
McLaurin, Emily J.
中科院分区：
文献类型：
--
作者：
Siramdas, Raghavender;McLaurin, Emily J.
本文报道了使用微波辅助方法成功地合成了不同尺寸的发光INP纳米晶体（NCS）。 NC光致发光（PL）的钥匙是使用1-丁基-4-甲基吡啶丁丁二氟二氟丁丁（BMPY BF4），这是一种带有含氟的阴离子的离子液体（IL）。 IL既负责反应溶液的快速加热和NCS的有效PL。通过与其他离子液体进行比较，使用烧瓶和加热地幔进行的类似合成以及在碳化硅（SIC）容器中的微波辅助合成来证明这一点。添加胺的INP NC尺寸范围从相似至3.2-4.2 nm，计算出的（PL从相似的645-630 nm），量子产率（Qys）最高为30％（Qys），最高为30％，PL全宽度为一半， （FWHM）值小的值类似于0.18 eV（与632 nm时的59相似），而无需优化。通过利用有效的微波辅助加热，此简单过程为不同直径的发光INP NC提供了途径，而无需更改前体，进行连续添加反应物或其他后反应处理（例如，壳体生长，HF蚀刻）。
This article reports the successful synthesis of luminescent InP nanocrystals (NCs) of different sizes using microwave-assisted methods. The key to NC photoluminescence (PL) is the use of 1-butyl-4-methylpyridinium tetrafluoroborate (BMPy BF4), an ionic liquid (IL) with a fluoride-containing anion. The IL is responsible for both rapid heating of the reaction solution and efficient PL from the NCs. This is demonstrated by comparison with other ionic liquids, an analogous synthesis done using a flask and heating mantle, and a microwave-assisted synthesis in a silicon carbide (SiC) vessel. Addition of amine results in InP NC sizes ranging from similar to 3.2-4.2 nm, calculated (PL from similar to 645-630 nm) with quantum yields (QYs) of up to 30% and PL full-width-at-half-max (fwhm) values as small as similar to 0.18 eV (similar to 59 at 632 nm) without optimization. By taking advantage of efficient microwave-assisted heating, this simple procedure provides a pathway to luminescent InP NCs of different diameters without changing precursors, performing sequential additions of reactants, or other postreaction processing (e.g., shell growth, HF etching).