Zhang Lin, Shi Ran, Qiu Hengwei, Jiang Xiaofan, Sun Genban, Long Run, Fang Wei-Hai
College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100875, China.
Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China.
J Phys Chem Lett. 2022 Dec 29;13(51):11936-11941. doi: 10.1021/acs.jpclett.2c03508. Epub 2022 Dec 19.
Recent developments in the perovskite field have aimed at exploring cluster-based organic-inorganic copper(I) halides as novel luminescent materials because of their low toxicity and structural diversity. However, the poor framework stability and low dispersion in solvent constitute the key challenges to their practical applications such as luminescent inks. Herein, we report the preparation of highly luminescent inks via one-pot solution synthesis, which consisted of ionic CuI clusters (tetrabutylammonium copper iodide) coupled with polymer polyvinylpyrrolidone (PVP). Benefiting from the high-affinity PVP to stabilize and disperse the Cu-I inorganic units, the obtained hybrid nanocrystals exhibit high structural stabilitiy/photostability and good dispersion in ethanol. The characteristics of bright white light emission from inks were explored by temperature-dependent photoluminescence experiments and theoretical calculations. Attractively, the stable, highly luminescent inks show great potential for practical applications, such as anticounterfeiting and imaging identification. Our study offers a new material designing strategy that may be generalized to many other material classes.
钙钛矿领域的最新进展旨在探索基于团簇的有机-无机卤化亚铜（I）作为新型发光材料，因为它们具有低毒性和结构多样性。然而，较差的骨架稳定性和在溶剂中的低分散性构成了它们在诸如发光油墨等实际应用中的关键挑战。在此，我们报道了通过一锅法溶液合成制备高发光油墨，该油墨由离子型CuI团簇（四丁基碘化铵铜）与聚合物聚乙烯吡咯烷酮（PVP）耦合而成。受益于PVP的高亲和力以稳定和分散Cu-I无机单元，所获得的杂化纳米晶体表现出高结构稳定性/光稳定性以及在乙醇中的良好分散性。通过温度依赖的光致发光实验和理论计算探索了油墨发出亮白色光的特性。吸引人的是，稳定的、高发光的油墨在诸如防伪和成像识别等实际应用中显示出巨大潜力。我们的研究提供了一种新的材料设计策略，该策略可能推广到许多其他材料类别。
