Abstract
A novel type of transparent monitor with high-resolution images based on Si-SiO2 core-shell nanoparticles is presented in this contribution. In this monitor, a quasi-array of nanoparticles was used to obtain a very sharp scattering profile. For this purpose, the Si-SiO2 nanoparticles were synthesized and with controlling the size of particles, the dominant emission wavelength was controlled. For the fabrication of a blue color transparent monitor the solution processed Si-SiO2 nanoparticles were dispersed in polystyrene and then coated on a transparent glass surface. After drying the film, the typical features representing a transparent monitor were studied. A video projector was used and text and pictures were sent on the monitor. This monitor reveals very attractive features such as simplicity, wide viewing angle, scalability to larger sizes and low cost. Importantly, the texts and pictures can be well presented on both sides of the fabricated monitor. The composite thin film can be also separated from the glass and can be used as a flexible display. To shed light on the impact of the structure on the optical properties Si-SiO2 and Ag nanomaterials representing perfect arrays of nanoparticles, quasi-arrays and randomly oriented nanoparticles were calculated/simulated using the finite-difference time-domain (FDTD) method. The results were compared to the experimental data and show a high accordance.
Highlights
Transparent displays are ‘see-through’ screens: a person can simultaneously view both the graphics on the screen and real-world content
In the here presented structure for a transparent display we used an array of nanoparticles close to the periodic case to allow very sharp peaks[33,34,35,36]
For a comparison between white paper as a screen and transparent display, we presented an image on white paper too
Summary
Transparent displays are ‘see-through’ screens: a person can simultaneously view both the graphics on the screen and real-world content. Among displays for which the image is provided by a projector one of the simplest approaches is known as “head-up” display[7]. The structure of this kind of display consists of two mirrors that guide through the light from the main display to the viewer’s eye. Diffusive displays have solved the viewing angle problem by scattering the projector’s light[8,9]. A different approach for displays is the use of spherical silver nanoparticles[14] which selectively scatter blue wavelengths and provide lower emission for other wavelengths. The resolution in the planar technology depends on lithography which is an expensive procedure and large size displays cannot be fabricated
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