In situ aluminium ions regulation for quantum efficiency and light stability promotion in white light emitting material.
In situ aluminium ions regulation for quantum efficiency and light stability promotion in white light emitting material.
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原位铝离子调控提高白光发射材料的量子效率和光稳定性
作者：
在这项研究中，我们提出了一种原位离子调节策略来组装具有高稳定性和高效率的白光发光材料。将荧光染料2-萘酚-3,6-二磺酸二钠(R)和ZnO量子点（QDs）按比例嵌入金属有机框架（MOFs）中，采用“绕瓶航行”的方法制备了一种荧光可调杂化材料。然后，利用铝离子对锌离子与R的竞争配位来巧妙地调节蓝色荧光的强度，从而产生理想的白光，其国际发光委员会（CIE）坐标为（0.30,0.33），显色指数（CRI）高达93%。与直接调整R盐和ZnO量子点的比例制备的材料相比，原位离子调节策略使最终产品具有更高的量子效率和光稳定性。此外，该策略还解决了铝离子和锌离子在同一合成体系中存在竞争配位效应导致荧光不可调的问题。这种合成策略和我们的新发现可以为设计新的白光发光材料提供更多的思路。一种高稳定、高效率组装白光材料的原位离子调节策略。
In this study, we have proposed an in situ ion regulation strategy to assemble a white-light-emitting material with high stability and efficiency. A fluorescence tunable hybrid material was first fabricated by a “ship around the bottle” method in which the fluorescent dyes, disodium 2-naphthol-3,6-disulfonate (R) and ZnO Quantum Dots (QDs), were embedded into metal–organic frameworks (MOFs) in proportion. Then, the competition coordination of aluminium ions over zinc ions to R were utilized to subtly adjust the intensity of blue fluorescence, leading to an ideal white light with Commission Internationale de l'Eclairage (CIE) coordinates of (0.30, 0.33) and a high Color-Rendering Index (CRI) value of 93%. Compared with the material fabricated by the ratio tuning of the R salt and ZnO QDs directly, the in situ ions regulation strategy enabled the final product to have a higher quantum efficiency and light stability. Moreover, this strategy also settled the non-tunable problem of fluorescence due to the competition coordination effects of aluminium ions and zinc ions in the same synthetic system. This synthetic strategy and our new findings can provide more ideas for designing new white-light-emitting materials. An in situ ion regulation strategy to assemble white-light-emitting material with high stability and efficiency.
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