The silver-nanoparticle plasmonic filter applied to organic light emitting diode
|關鍵字:||銀奈米粒子;表面電漿;有機發光二極體;silver nanoparticle;surface plasmon;organic light emitting diode|
Because solid-state light-emitting electrochemical cells (LECs) have several advantages such as simple device structure, solution processability, and low operation voltage, they have great potential applications in display and illumination. In this work, we combined the emissive material of blue-green ionic complex and localized surface plasmon of silver nanoparticles to produce white light. The silver nanoparticles have localized surface plasmon which can absorb blue light for the silver nanoparticles in air ambient. By changing the ambient of silver nanoparticle, the resonant wavelength of localized surface plasmon of silver nanoparticle would change. Consequently, the absorption of silver nanoparticle would change. The emission spectrum of full width at half maximum of ionic blue-green complex is broad which has a main peak at blue-green wavelength and a tail at red wavelength. The silver nanoparticle in indium tin oxide (ITO) ambient can absorb the green part of emission light of ionic complex. Hence the intensity of green light emitted from ionic complex is decreased but the blue and red lights are nearly no changed. By combining the rest of green light and blue and red lights, the white emission light from LECs is produced successfully. Since the blue part of emission light of ionic complex is stronger than the green light, the emission white light is cold white light. In this thesis, we successfully fabricated white light device without additional doping into emissive material and the duration of white emission light is long. The preference of this device is in the display.
|Appears in Collections:||Thesis|