An electronic model for self-assembled hybrid organic/perovskite   semiconductors: reverse band edge electronic states ordering and spin-orbit   coupling
  Based on density functional theory, the electronic and optical properties of hybrid organic/perovskite crystals are thoroughly investigated. We consider the mono-crystalline 4FPEPI as material model and demonstrate the optical process is governed by three active Bloch states at the {\Gamma} point of the reduced Brillouin zone with a reverse ordering compared to tetrahedrally bonded semiconductors. Giant spin-orbit coupling effects and optical activities are subsequently inferred from symmetry analysis. 
J. Even, L. Pedesseau, M.-A. Dupertuis, J.-M. Jancu, and C. Katan
cond-mat.mtrl-sci cond-mat.other