Schedule 1 9:30 AM - 9:45 AM [OWPT4-02] GaAs Based Engineered Substrates for Lattice Matched Epitaxial Growth on Lattice Constants between GaAs and InP *Henning Helmers1, Alexander Franke1, Jens Ohlmann1, Frank Dimroth1, David Lackner1 (1. Fraunhofer Institute for Solar Energy Systems ISE)