Laser-scanned programmable color temperature of electroluminescence from white light-emitting electrochemical cells
Journal
ACS Applied Materials and Interfaces
Journal Volume
8
Journal Issue
46
Pages
31799-31805
Date Issued
2016
Author(s)
Abstract
Recently, the control of correlated color temperature (CCT) of artificial solid-state white-light sources starts to attract more attention since CTs affect human physiology and health profoundly. In this work, we proposed and demonstrated a method that can widely tune the CCTs of electroluminescence (EL) from white-light-emitting electrochemical cells (LECs) by employing plasmonic filters. These integrated on-chip plasmonic filters are composed of semicontinuous thin Ag film or Ag nanoparticles (NPs) both included in the indium tin oxide anode contact, which have different characteristics of plasmonic resonant absorptions that can tune the EL spectra of white LECs. The CCTs of EL from white LECs integrated with semicontinuous thin Ag film and randomly distributed Ag NPs are 5778 and 2350 K, respectively. A commercially available laser scanning system was used to locally thermal anneal the semicontinuous thin Ag film to form the randomly distributed Ag NPs on the scanned areas. Hence, these two kinds of filters can be integrated on the same chip of white LEC, giving more freedom to control the CCTs of white EL and more potential applications. In addition, the laser scanning system used here is quite often used in display manufactures so that our proposed method can be immediately adopted by the light-emitting diode industry. ? 2016 American Chemical Society.
Subjects
color temperature; light-emitting electrochemical cells; nanoparticles; plasmonic filter; white light
Other Subjects
Color; Electroluminescence; Imaging systems; Indium; Laser applications; Light; Light emitting diodes; Light sources; Nanoparticles; Physiology; Plasmons; Silver; Surface analysis; Tin oxides; Color temperatures; Correlated color temperature; Indium-tin-oxide anodes; Laser scanning systems; Light-emitting electrochemical cell; Plasmonic filters; Solid-state white light; White light; Electrochemical cells
Type
journal article