A semiconductor device is provided comprising a first potential well located within a pn junction and a second potential well not located within a pn junction. The potential wells may be quantum wells. The semiconductor device is typically an LED, and may be a white or near-white light LED. The semiconductor...http://www.google.ca/patents/US7745814?utm_source=gb-gplus-sharePatent US7745814 - Polychromatic LED's and related semiconductor devices
