Red-green-blue light emitting diodes and distributed Bragg reflectors based on ZnCdMgSe lattice-matched to InP

Wide bandgap II-VI materials and structures based on ZnCdMgSe alloys lattic e matched to InP substrates have been investigated. Quantum well (QW) struc tures designed to emit throughout the entire visible spectral range M cre c onstructed by varying the QW layer thickness and/or composition. Light emit ting diode (LED) structures were grown, fabricated and tested. Electrolumin escence emission in the blue, green, yellow and red regions of the visible spectral range were obtained from lattice-matched or pseudomorphic structur es that varied only in the composition or thickness of the QW layer. Lattic e-matched distributed Bragg reflector (DBR) structures with reflectivity ma xima. in the red, green and blue were also grown and characterized. Since t he LED and DBR structures are made from the same materials it should be pos sible to combine these into a single structure for the design of high perfo rmance LEDs and vertical cavity surface emitting lasers that operate in the entire visible range. (C) 2001 Elsevier Science B.V. All rights reserved.