Stretchable afterglow materials have garnered widespread attention owing to their unique combination of optical properties and mechanical flexibility.However,achieving a crystal environment to suppress the non-radiati...Stretchable afterglow materials have garnered widespread attention owing to their unique combination of optical properties and mechanical flexibility.However,achieving a crystal environment to suppress the non-radiative transition of triplet excitons poses a challenge in constructing stretchable afterglow materials.Herein,we utilize an in situ supersaturated crystallization strategy to form afterglow microcrystals within a hydrogel matrix.This approach enables afterglow emission with a lifetime of 695 ms while maintaining high stretchability with tensile stress surpassing 398 kPa,extensibility over 400%and a high water content of 65.21%.Moreover,the universal supersaturated crystallization strategy allows for conferring tunable afterglow performance.Successful demonstrations in hydrogel 3D printing and anticounterfeiting purposes showcase the potential for advanced applications of 3D printable afterglow hydrogels.This investigation provides guidelines for generally designing efficient afterglow hydrogels and addresses the inherent contradiction between flexibility and rigid in stretchable afterglow materials.展开更多
基金supported inpart by the National Natural Science Foundation of China(22322106,22075149,62075102,22105104,22305126,62174085 and 62288102)the Open Research Fund of Songshan Lake Materials Laboratory(2022SLABFN16)+1 种基金the Hua Li Talents Program of Nanjing University of Posts and Telecommunications,the Project of State Key Laboratory of Organic Electronics and Information Displays,Nanjing University of Posts and Tele-communications,(No.GDX2024010002)Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX24_1146 and SJCX22_0250).
文摘Stretchable afterglow materials have garnered widespread attention owing to their unique combination of optical properties and mechanical flexibility.However,achieving a crystal environment to suppress the non-radiative transition of triplet excitons poses a challenge in constructing stretchable afterglow materials.Herein,we utilize an in situ supersaturated crystallization strategy to form afterglow microcrystals within a hydrogel matrix.This approach enables afterglow emission with a lifetime of 695 ms while maintaining high stretchability with tensile stress surpassing 398 kPa,extensibility over 400%and a high water content of 65.21%.Moreover,the universal supersaturated crystallization strategy allows for conferring tunable afterglow performance.Successful demonstrations in hydrogel 3D printing and anticounterfeiting purposes showcase the potential for advanced applications of 3D printable afterglow hydrogels.This investigation provides guidelines for generally designing efficient afterglow hydrogels and addresses the inherent contradiction between flexibility and rigid in stretchable afterglow materials.
