Quantum dots transparent display (QDs-TPD) using a liquid QDs layer and N2 barrier discharge

摘要

Quantum dots transparent display (QDs-TPD) was realized using a liquid QDs layer and N₂ barrier discharge panel. In the N₂ discharge, the 2nd+ lines of N₂ in the range of 300 - 400 nm (C3Π_u – B3Π_g), and the 1st- lines of N₂+ at 391.4 and 427.8 nm (B2Σ_u+ - X2 Σ_g+) were mainly observed, while the visible emission lines were rarely observed. This implies the N₂ discharge is suitable for the excitation source of the QDs, due to the strong ultra-violet radiations and the weak visible emissions. The emission centers for red, green, and blue color in QDs-TPD were positioned at 452, 540, and 638 nm, respectively, and the N₂ emission peaks were seldom observed in the visible region. The transmittance of QDs-TPD was approximately 40% in the visible region and the luminescence was about 70 cd/m2. The CIE (x, y) coordinates of red, green, and blue colors were (0.670, 0.309), (0.378, 0.640), and (0.183, 0.118), respectively, and the color gamut was 71% of a NTSC standard. Thus, the QDs-TPD is expected as a way for realizing the TPD, due to its good transparency, excellent visibility, wide viewing-angle, aesthetical design, low cost production, and good scalability to large sizes.