Controllable synthesis of CsPbI3 nanorods with tunable photoluminescence emission,RSC Advances

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Controllable synthesis of CsPbI3 nanorods with tunable photoluminescence emission
RSC Advances ( IF 3.9 ) Pub Date : 2019-08-12 00:00:00 , DOI: 10.1039/c9ra04600c
Zhikai Wen _{1,

2} , Wei Zhai _{1,

2} , Chang Liu _{1,

2} , Jing Lin _{1,

2} , Chao Yu _{1,

2} , Yang Huang _{1,

2} , Jun Zhang _{1,

2} , Chengchun Tang _{1,

2}

Affiliation

So far the controllable synthesis of one-dimensional (1D) CsPbI₃ nanocrystals still remains a challenge due to the fast reaction kinetics of the iodine system as compared with other halide perovskites. Here we report the direct synthesis of high-quality 1D CsPbI₃ nanorods by a facile solvothermal method. The as-prepared CsPbI₃ nanorods show high purity and uniform morphology with ultrafine diameters down to ∼5 nm. By simply changing the solvothermal reaction conditions, fine-tuning of the sizes of the CsPbI₃ nanorods can be well achieved, which leads to the successful modulation of their photoluminescence (PL) emission. The solvothermal reaction offers relatively low crystal growth rate, which is of great importance for the size control of the CsPbI₃ nanocrystals. PL quantum yields (PLQYs) and lifetime results indicate that the obtained nanorods maintain a good surface state over long reaction time. Our work not only provides a reliable means for the synthesis of 1D iodine-related perovskites, but also expands the study of size-related PL properties on perovskites nanocrystals.

中文翻译：

具有可调光致发光发射的 CsPbI3 纳米棒的可控合成

到目前为止，与其他卤化物钙钛矿相比，由于碘系统的快速反应动力学，一维（1D）CsPbI ₃纳米晶体的可控合成仍然是一个挑战。在这里，我们报告了通过简便的溶剂热法直接合成高质量的一维 CsPbI ₃纳米棒。所制备的CsPbI ₃纳米棒具有高纯度和均匀的形态，超细直径低至~5 nm。通过简单地改变溶剂热反应条件，微调 CsPbI _3的尺寸纳米棒可以很好地实现，这导致其光致发光（PL）发射的成功调制。_{溶剂热反应提供了相对较低的晶体生长速率，这对于CsPbI 3}纳米晶体的尺寸控制非常重要。PL 量子产率 (PLQY) 和寿命结果表明，获得的纳米棒在较长的反应时间内保持良好的表面状态。我们的工作不仅为一维碘相关钙钛矿的合成提供了可靠的手段，而且还扩展了钙钛矿纳米晶体上与尺寸相关的 PL 特性的研究。

更新日期：2019-08-12

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