Nanowerk April 27, 2024 Researchers in China developed a contactless user-interactive sensing display (CUISD) based on dynamic alternating current electroluminescence (ACEL) that responds to humidity. Sub second humidity-induced luminescence was achieved by integrating a highly responsive hydrogel into the ACEL layer. The patterned silver nanofiber electrode and luminescence layer, produced through electrospinning and microfabrication, resulted in a stretchable, large-scale, high-resolution, multicolor, and dynamic CUISD. It was implemented for the real-time control of a remote-controlled car, wherein the luminescence signals induced by touchless finger movements were distinguished and encoded to deliver specific commands. The distinctive recognition of breathing facilitates the CUISD […]
Tag Archives: Electroluminescence
Scientists demonstrate new, improved way to make infrared light, with quantum dots
Phys.org September 6, 2023 In the visible spectrum, electroluminescence from colloidal quantum dots is highly efficient, wavelength tunable and cost effective, which motivates using the same approach in the infrared. Despite the promising performances of colloidal quantum dots light-emitting diodes in the near-infrared, mid-infrared devices show quantum efficiencies of about 0.1% due to the much weaker emission. These devices relied exclusively on the interband transition, restricting the possible materials. Researchers at the University of Chicago showed electroluminescence at 5 µm using the intraband transition between 1Se and 1Pe states within the conduction band of core–shell HgSe–CdSe colloidal quantum dots. The 4.5% […]