Color-Tunable Organic Light-Emitting Displays for Interactive Multi-Signal Visualization

Optoelectronic devices integrated with multiple functions for interactive signal visualization have become increasingly important in the intelligent era. Here, a color-tunable organic light-emitting diode (CTOLED) is developed to achieve a user-interaction intelligent device that enables multicolor visualization of infrared light and temperature distribution via the modulation with a multi-stimuli responsive silicon (Si) sensor for the first time. The key to the color-tunable functionality of the CTOLED is an ultrathin exciton-blocking layer between different emitting layers, which leads to the quantitative correlation of driving current and emitted visible color. As a result, the user can manipulate the silicon/color-tunable organic light-emitting diode (Si/CTOLED) device through the infrared pen, and the "writing" spatial information and the infrared intensity can influence the display patterns and colors. Besides, the temperature is sensed by the flexible Si/CTOLED device and is displayed in corresponding different colors, which is promising as a wearable temperature visualization monitor and directly interact with a user. The temperature monitor exhibits ultrasensitivity with a low minimum distinguishable temperature difference of only 65 mK. The Si/CTOLED devices open new possibilities for the development of intelligent devices and have promising multi-disciplinary applications.