This proposal is a Major Research Equipment Request for establishing a Metalorganic Chemical Vapor Deposition (MOCVD) facility at the University of California at San Diego (UCSD). The proposed facility will mainly provide advanced semiconductor materials for optoelectronic device and material research efforts at UCSD. The portion of the support from UCSD will be used for purchasing a basic MOCVD reactor, and the portion requested of NSF will be used to obtain the needed accessories to operate the reactor. These accessories include a vacuum pump with controlling system, a hydrogen purifier, a toxic gas monitor, and temperature baths to metalorganic sources. This proposal also describes various present and future III-V semiconductor optoelectronic device research projects that can be benefitted by this facility.