3D printing pioneer Michael McAlpine will present his team's strategy for three-dimensionally integrating diverse classes of functional materials using a custom-built 3D printer to fully create fully 3D printed device components built around active electronics. As a proof of concept, they have 3D printed quantum dot-based light-emitting diodes (QD-LEDs), polymer-based photodiodes on curvilinear surfaces, and hybrid devices over large scales with high yield. According to McAlpine's team, these results represent a critical step toward the 3D printing of high-performance, active electronic materials and devices.