Issue 48, 2018

External current-controlled dynamic display by integrating upconversion micro-disks with power density-dependent color into NIR luminescent diodes

Abstract

An externally controlled color-tunable light-emitting device is always the frontier of color display. However, multiple colors are usually realized using different materials with variable composition, phase or structure. Developing materials, which can emit tunable colors on changing external stimuli in a fixed composition, will avoid the energy loss by mixing different materials emitting a single color. Here, we designed a core–shell upconversion micro-disk structure with high concentration of Yb3+ doped in the core. Fine-tuning color output is achieved by varying the power density of the excitation light within a range of 0.8–12.9 W cm−2, which is lower than most of the reported ones and can be realized by commercial NIR-LED. Importantly, we designed a dynamic display device by integrating the micro-disks in a series of NIR-LEDs. For the first time, the dynamic red, orange, yellow and green colors can be demonstrated by simply changing the external current. A red shape of a standing human and a green shape of human with walking step can be dynamically realized in a LED array by varying the external current.

Graphical abstract: External current-controlled dynamic display by integrating upconversion micro-disks with power density-dependent color into NIR luminescent diodes

Supplementary files

Article information

Article type
Communication
Submitted
09 10月 2018
Accepted
05 11月 2018
First published
06 11月 2018

J. Mater. Chem. C, 2018,6, 13101-13107

External current-controlled dynamic display by integrating upconversion micro-disks with power density-dependent color into NIR luminescent diodes

Z. Meng, S. Wu and S. Zhang, J. Mater. Chem. C, 2018, 6, 13101 DOI: 10.1039/C8TC05087B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements