Large-Sized Nanoparticles as Novel Promising Optoelectronic Materials

In the present report principal optical properties, of semiconducting large-sized nanocrystalline (LSNC) (with thickness within 10-50 nm) are presented. A quantitative parameter for description of the LSNC state is introduced. Influence of the surrounding polymer matrices on the properties of the LSNC is shown. Role of the surrounding polymer matrix background in the manifestation of the optoelectronic properties is studied. Physical insight of the nano-confined effects manifesting for the case of LSNC is introduced. Typical methods using for simulations of band energy structure as well as for the reconstructed structure are presented. It is shown a necessity of substantial modification of the simulation methods developed for bulk-like crystalline materials for the LSNC. Superposition of the long-range ordering with the localized nano-quantized effects is analyzed within a framework of different one-electron band energy approaches. Role of electron screening effects in this case becomes of crucial importance. Occurrence of flattering in the band energy dispersion is discovered. Coexistence of the energy sub-bands with different effective masses is one of an advantageous of the LSNC. Manifestation of the LSNC non-liner optical (NLO) properties will be presented separately. It is clearly demonstrated that only appropriate choosing of the LSNC geometry parameters together with appropriate chemical content modification could enhance the key NLO parameters