Wang Jing-Jing, Chen Chen, Chen Wei-Guo, Yao Ji-Song, Yang Jun-Nan, Wang Kun-Hua, Yin Yi-Chen, Yao Ming-Ming, Feng Li-Zhe, Ma Cheng, Fan Feng-Jia, Yao Hong-Bin
Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale , University of Science and Technology of China , Hefei , Anhui 230026 , China.
Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences , University of Science and Technology of China , Hefei , Anhui 230026 , China.
J Am Chem Soc. 2020 Feb 26;142(8):3686-3690. doi: 10.1021/jacs.9b12908. Epub 2020 Feb 14.
Highly luminescent inks are desirable for various applications such as decorative coating, art painting, and anticounterfeiting, to name a few. However, present inks display low photoluminescent efficiency requiring a strong excitation light to make them glow. Here, we report a highly luminescent ink based on the copper-iodide/1-Propyl-1,4-diazabicyclo[2.2.2]octan-1-ium (CuI(pr-ted)) hybrid cluster with a quantum efficiency exceeding 98%. Under the interaction between the CuI(pr-ted) hybrid cluster and polyvinylpyrrolidone (PVP), the highly luminescent CuI(pr-ted)/PVP ink can be facilely prepared via the one-pot solution synthesis. The obtained ink exhibits strong green light emission that originates from the efficient phosphorescence of CuI(pr-ted) nanocrystals. Attractively, the ink displays high conversion efficiency for the ultraviolet light to bright green light emission due to its wide Stokes shift, implying great potential for anticounterfeiting and luminescent solar concentrator coating.
高发光油墨适用于多种应用，如装饰涂料、艺术绘画和防伪等。然而，目前的油墨光致发光效率较低，需要强光激发才能发光。在此，我们报道了一种基于碘化铜/1-丙基-1,4-二氮杂双环[2.2.2]辛烷-1-鎓（CuI(pr-ted)）杂化簇的高发光油墨，其量子效率超过98%。在CuI(pr-ted)杂化簇与聚乙烯吡咯烷酮（PVP）的相互作用下，通过一锅法溶液合成可轻松制备高发光的CuI(pr-ted)/PVP油墨。所得油墨呈现出强烈的绿色发光，这源于CuI(pr-ted)纳米晶体的高效磷光。吸引人的是，由于其较大的斯托克斯位移，该油墨对紫外光到亮绿色光发射具有高转换效率，这意味着在防伪和发光太阳能聚光器涂层方面具有巨大潜力。
