1. Solid State Lighting and Energy Center, University of California, Santa Barbara, California 93106, Computational Science, Department of Chemistry, and Applied Biosciences, ETH Zurich, c/o USI Campus, Via Giuseppe Buffi 13, CH-6900 Lugano, Switzerland, Peter A. Rock Thermochemistry Laboratory and NEAT-ORU, University of California, One Shield Avenue, Davis, California 95616, and Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, U.K.