Liu Jiahui, Wang Guangming, Wang Xuepu, Sun Yan, Zhou Bei, Zou Yunlong, Wang Biaobing, Zhang Kaka
Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, 213164, P. R. China.
Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic, Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China.
Chemistry. 2021 Dec 1;27(67):16735-16743. doi: 10.1002/chem.202103020. Epub 2021 Nov 5.
The fabrication of room-temperature organic phosphorescence and afterglow materials, as well as the transformation of their photophysical properties, has emerged as an important topic in the research field of luminescent materials. Here, we report the establishment of energy landscapes in dopant-matrix organic afterglow systems where the aggregation states of luminescent dopants can be controlled by doping concentrations in the matrices and the methods of preparing the materials. Through manipulation by thermodynamic and kinetic control, dopant-matrix afterglow materials with different aggregation states and diverse afterglow properties can be obtained. The conversion from metastable aggregation state to thermodynamic stable aggregation state of the dopant-matrix afterglow materials to leads to the emergence of intriguing afterglow transformation behavior triggered by thermal and solvent annealing. The thermodynamically unfavorable reversible afterglow transformation process can also be achieved by coupling the dopant-matrix afterglow system to mechanical forces.
室温有机磷光和余辉材料的制备及其光物理性质的转变，已成为发光材料研究领域的一个重要课题。在此，我们报道了在掺杂剂 - 基质有机余辉体系中能量景观的建立，其中发光掺杂剂的聚集态可通过基质中的掺杂浓度和材料制备方法来控制。通过热力学和动力学控制手段，可以获得具有不同聚集态和多样余辉性质的掺杂剂 - 基质余辉材料。掺杂剂 - 基质余辉材料从亚稳态聚集态到热力学稳定聚集态的转变，引发了由热退火和溶剂退火触发的有趣的余辉转变行为。通过将掺杂剂 - 基质余辉体系与机械力耦合，还可以实现热力学上不利的可逆余辉转变过程。
