Fig. 2: Photolithographically patternable QD-PR.
From: Flexible micro-LED display and its application in Gbps multi-channel visible light communication
Optical images of patterned QD-PR, photoluminescence spectra, and UV-Vis absorption spectra of red QD (a) and green QD (b), respectively. QDs with a size of 50 μm × 50 μm are patterned on a glass substrate. Scale bar: 100 μm. Scale bar: 50 μm (inset). c Electroluminescence spectra of the micro-LED coated with red QD-PR are measured by varying the concentration of QDs in PR (10, 20, 30, 40, and 50 wt%). d Electroluminescence spectra of the micro-LEDs after mixing TiO2 into 30 wt% green QD-PR (0, 2.5, 5, 7.5, and 10%). e Optical image showing the off state (left) of the micro-LEDs with patterned QD-PR and on-state (right) after the application of forward voltage. Scale bar: 200 μm. Electroluminescence spectra (f) and CIE chromaticity (g) indicating the color properties of the fabricated RGB micro-LEDs.
