Author:
Dehury Kshetra Mohan,Prakash G. Vijaya
Abstract
The self-assembled IO hybrid semiconductors have been widely explored due to their unique characteristics of the formation of different dimensionalities crystal structural packing. The room temperature Mott-type excitons are formed as a result of quantum confinement and dielectric contrast effects. The excited free electron and hole bound together through strong coulomb interaction which is known as excitons and the excitons energy levels are present slightly below the conduction band. The large dielectric constant of extended inorganic network structure reduces the strong coulomb interaction between the excited free electron and holes known as Mott-type excitons. The Mott-type excitons has larger Bohr radius (30-100 A°) as compared to lattice spacing and having binding energies~10-30 meV. The different crystal structural packing are formed due to the structural reorganization of organic moiety (based on shape, size and position of amine group) within the extended inorganic layered structure. A systematic study of synthesis, structural and optical properties of 2D [(C12H25-NH3)2PbI4] nanoparticles are discussed and presented.