Red and near infrared microcavity light-emitting diodes
Lighting is essential to modern society but it accounts for nearly 20 % of the electrical energy usage. Thus efforts to increase the conversion efficiencies of light sources are attracting more and more attention. Potential high efficiency light sources are fluorescent lamps or light-emitting diodes (LEDs). Modern LEDs show internal quantum efficiencies of virtually 100 %. However, in the case ...