Synthesis and optical properties of CsCu2Br3–Cu0 nanoheterojunctions
Synthesis and optical properties of CsCu2Br3–Cu0 nanoheterojunctions
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CsCu2Br3·Cu0纳米异质结的合成及光学性质
DOI：
10.1039/d2tc03214g
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Ling Huang
中科院分区：
文献类型：
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作者：
Qifei Ying;Tingwei Hua;Yilin Wang;Xiangdong Liu;Yang Wei;Hongbo Li;Ling Huang
经过精心制作的异质结已被证明能够为先进材料带来新的功能和改进的性能。受卤化物钙钛矿材料良好吸附的启发，我们报道了无毒CsCu2Br3-Cu0异质结纳米棒(NRS)的一锅法精确控制生长。系统分析表明，在高温下，油胺可以将Pb2+和Cu2+分别还原为Pb0和Cu2+，而Pb0的出现引发了Cu2+进一步还原为Cu0。Cu0的连续生长形成了CuNPs，进而形成了火柴棒状的CsCu2Br3-Cu0异质结。光致发光光谱表明，CsCu2Br3-Cu0异质结界面形成的晶格畸变导致发射峰蓝移和分裂，这是以前没有观察到的。
The deliberately fabricated heterojunctions have proved to be able to bring novel functionalities and improved performance for advanced materials. Herein, inspired by the excellent absorption of halide perovskite materials, we report the precisely controlled growth of non-toxic CsCu2Br3–Cu0 heterojunction nanorods (NRs) through one-pot synthesis. Systematic analyses have shown that Pb2+ and Cu2+ can be reduced to Pb0 and Cu+, respectively, by oleylamine at high temperature, while the appearance of Pb0 initiates further reduction of Cu+ into Cu0. The continuous growth of Cu0 forms Cu NPs and then matchstick-like CsCu2Br3–Cu0 heterojunctions. Photoluminescence spectra suggest that the lattice distortion formed at the interface of the CsCu2Br3–Cu0 heterojunctions leads to the blue-shifting and splitting of the emission peak, which has not been observed previously.