Abstract
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 (C3Πu – B3Πg), and the 1st- lines of N2+ at 391.4 and 427.8 nm (B2Σu+ - X2 Σg+) 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.
Highlights
Transparent display (TPD) is an electronic information device that has gained rapidly growing attention recently
The cells of a liquid quantum dots (QDs) layer were installed on the N2 discharge panel using a glass and spacer 1, and the QDs solutions were inserted into the cells using a syringe
The N2 barrier discharge was a coplanar type, and the liquid QDs layer was constructed on the N2 discharge panel
Summary
Transparent display (TPD) is an electronic information device that has gained rapidly growing attention recently. The emissive type displays in the bright environment must need visibility improvement, and the passive type display in the dark environment must require an edge type back light unit. The combination of the liquid QDs layer and the plasma discharge can build TPD with good transparency and visibility, and this approach makes it possible to produce largesized panels in low cost. A different type TPD was realized using stacked liquid QDs layer - N2 barrier discharge panel. The liquid QDs layer was used as an emission source of the visible light and N2 barrier discharge was generated as an ultra-violet (UV) source for the excitation of QDs. The opto-electrical properties of the N2 barrier discharge were investigated, and the properties of the QDs-TPD were studied to confirm the feasibility of the TPD
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