Title: White-light-emitting flexible display devices based on double network hydrogels crosslinked by YAG:Ce phosphors

Authors: Yawen Xu, Jing Chen, Hua Zhang, Hua Wei, Linjie Zhou, Zhenwu Wang, Yuexiao Pan, Xinyan Su, Afang Zhang and Jun Fu

Abstract

White-light-emitting materials have attracted great research interest for applications in lighting, flexible display devices and biosensors. Traditional inorganic white-light-emitting materials are hard and brittle, which is difficult to apply in the field of flexible display devices. In this study, flexible and stretchable white-light-emitting double network composite hydrogels were prepared using vinyl-modified Ce-doped yttrium aluminum garnet phosphors (YAG:Ce-VTES) as crosslinkers and photoluminescent centers. The hydrogel is comprised of interpenetrating polyacrylamide (PAAm) network crosslinked by YAG:Ce-VTES and ion-crosslinked calcium alginate network. The alginate/PAAm double network hydrogels show good stretchability and toughness, with a fracture elongation up to 600% and a compression strength up to 3.6 MPa. Moreover, white-light-emitting flexible display devices have been illuminated using a blue backlight with high luminous efficiency, optical stability and low cost. This strategy constructs white-light-emitting hydrogels with good mechanical properties and lays a foundation for applications of flexible lighting and display devices.

论文链接：

https://pubs.rsc.org/en/content/articlelanding/2019/tc/c9tc05311e#!divAbstract