Highly sensitive color fine-tuning of diblock copolymeric nano-aggregates with tri-metallic cations, Eu(Ⅲ), Tb(Ⅲ), and Zn(Ⅱ),for flexible photoluminescence films(FPFs)

作者：Xinzhi Wang; Yao Wang; Xinbo Zhang; Wei Ding; Longlong Li; Linjun Huang; Laurence A.Belfiore^*; Jianguo Tang^*

来源：Journal of Materials Science & Technology, 2021, 65(06): 72-81.

Luminescence materials have shown promise as display apparatus and lighting devices. The particularly interesting systems are photoluminescence materials that are capable of reversible colors emitting repeatedly on exposure to light. Here we report a series of color tunable flexible and transparent photoluminescence films consisting of multi-metals(Eu3+, Tb3+ and Zn3+) induced polymer aggregates(MIPAs)which are distributed uniformly in the polyacrylonitrile(PAN) films without agglomeration. MIPAs have a unique spherical structure due to the self-assembly of polystyrene-block-polyacrylic acid(PS-b-PAA)induced by metal ions. Notably, when applied in photoluminescence devices, these photoluminescence films exhibit not only red, green, blue colors(RGB) light, but also other tuned various color light covering the whole visible range upon excitation of 345 nm through adjusting the relative ratios of metal complexes. As the most important key point, non-conductive polymers can be used in photoluminescence devices as host medium, which is not realized in electroluminescent devices. Thus, the flexible photoluminescence films(FPFs) innovated herein exhibit the great potential to apply for flexible light-color and light-energy transformation devices.