| 초록 |
Owing to the poor mechanical reliability of the solid matrices, little progress has been made in developing stretchable down-conversion white light-emitting diodes (WLEDs). In this work, we propose a novel strategy for fabricating flexible and stretchable down-conversion WLEDs based on six-color quantum dots (QDs)-incorporated gel matrix. Transparent and stretchable gels with large pores were created by binary-solvent-based gelation of polyvinyl alcohol (PVA) at low temperatures. Importantly, both of the QDs and the gel were created in the same two solvents, which made the QDs compatible with the gelation process. The QDs were incorporated into the gel without any properties’ degradation. Namely, the optical properties of the QDs in the liquid phase were retained in the gel phase. The QD gel (QDG) exhibited elastic deformation up to 200%, with uniform luminescence. In addition, the performance of the QDG-based WLED remained unchanged after more than 1000 bending/stretching cycles. |
