Light-emitting devices are provided that include a mixed-index layer having a buried grid disposed below a bottom electrode of the device. The grid provides improved outcoupling into glass and air modes relative to techniques that omit such a grid and/or that use a conventional low-index grid embedded in the emissive layers of the device.
STATEMENT REGARDING GOVERNMENT RIGHTS
 This application was made with government support under Contract No. DE-SC0001013 awarded by the U.S. Department of Energy (DOE), Office of Basic Energy Sciences, as part of the Center for Energy Nanoscience, Energy Frontier Research Center. The government may have certain rights in this invention.