A Single‐Pixel RGB Device in a Colorful Alphanumeric Electrofluorochromic Display

Abstract

With the rapid development of human society, consumer electronics have brought marvelous changes to human daily life, but they are accompanied by the much higher demand of display quality and visual experience. Therefore, ideal conversion among the three primary colors—red (R), green (G), and blue (B)—in a single pixel has been a better way to avoid the insurmountable technical barrier of subpixel technology of modern displays. Electrofluorochromic (EFC) materials capable of a novel luminescent switching, open a powerful way to design optoelectronic devices for displays and information storage etc. Colorful EFC devices, especially emitting the ideal three primary colors without subpixel technology, have been a challenge for years. Herein, a long‐awaited single‐pixel device with RGB color is fabricated successfully based on proton‐coupled electron transfer. The RGB EFC device exhibits outstanding EFC properties, such as low turn‐on voltage (+1.0 and −1.0 V), large color gamut, and good stability (500 cycles for each color). Prototypes of colorful alphanumeric displays are well demonstrated in a facile way. The success of this new exploration of single‐pixel RGB EFC device not only provides the possibility of full‐color emission in EFC devices, but also will widely broaden the EFC system and their applications.

Printable Off–On Thermoswitchable Fluorescent Materials for Programmable Thermally Controlled Full‐Color Displays and Multiple Encryption

“…applications in molecular switches, [8] dis play, [9] sensors, [10] bioimaging, [11] optical recording, [12] and information protec tion. [4,13] Among them, thermoswitchable fluorescent materials (TFMs) have attracted particular interest.…”

“…Switchable fluorescent materials manipulated by external stimuli (e.g., light, [ 1 ] electricity, [ 2 ] mechanical force, [ 3 ] solvent change, [ 4,5 ] and heat [ 6,7 ] ) have attracted extensive attention during the past few decades, due to their wide potential applications in molecular switches, [ 8 ] display, [ 9 ] sensors, [ 10 ] bioimaging, [ 11 ] optical recording, [ 12 ] and information protection. [ 4,13 ] Among them, thermoswitchable fluorescent materials (TFMs) have attracted particular interest.…”

Green revolution in electronic displays expected to ease energy and health crises

“…More importantly, the "reflective display" has a natural color mode (light scattering type) that human beings are inherently familiar with and gives users more adaptive color softness and eye comfort. The pioneering reflective display techniques include the use of cholesteric liquid crystals (CLCs) 4 , electronic ink (E-Ink)/e-paper 5,6 , electrowetting (EW) 7,8 , and electrochromism [9][10][11][12][13] . Taking E-Ink as an example, it is based on a microencapsulated electrophoretic technique.…”

Simultaneously achieving high capacity storage and multilevel anti-counterfeiting using electrochromic and electrofluorochromic dual-functional AIE polymers

“…[36][37][38] Taking advantage of the controllable stimulus change, these materials have been exploited in multicolor displays, smart windows, E-paper, sunglasses, etc. [39][40][41][42][43][44] However, less attention has been paid to anti-counterfeiting applications, [45][46][47][48][49] and the actual demand for high capacity storage and multilevel anti-counterfeiting cannot be realized by the reported technology. In principle, by combining the characteristics of controllable color and uorescence of electrochromic and electrouorochromic dual-functional materials, it may be possible to simultaneously realize information multiplexing storage and dynamic anti-counterfeiting.…”