Encapsulation engineering of porous crystalline frameworks for delayed luminescence and circularly polarized luminescence
Xiaoyan Lu, Kun Zhang, Xinkai Niu, Dan‐Dan Ren, Zhan Zhou, Li‐Long Dang, Hong-Ru Fu, Chaoliang Tan, Lu‐Fang Ma, Shuang‐Quan Zang
Abstract
the encapsulation engineering of guest emitters in PCFs, particularly focusing on delayed luminescence and circularly polarized luminescence. Initially, the general principle of phosphorescence, TADF and CPL, the combination of DF and CPL, and energy transfer processes between host and guests are introduced. Subsequently, we comprehensively discuss the critical factors affecting the encapsulation engineering of guest emitters in PCFs, such as pore structures, the confinement effect, charge and energy transfer between the host and guest, conformational dynamics, and aggregation model of guest emitters. Thereafter, we summarize the effective methods for the preparation of host-guest systems, especially single-crystal-to-single-crystal (SC-SC) transformation and epitaxial growth, which are distinct from conventional methods based on amorphous materials. Then, the recent advancements in host-guest systems based on PCFs for delayed luminescence and circularly polarized luminescence are highlighted. Finally, we present our personal insights into the challenges and future opportunities in this promising field.