Synthesis And Optical Properties Of Self-asembled2D Layered Organic-inorganic Perovskites For Optoelectronics

The innovation of advanced technology and the requirement of electronic market are always focusing on low cost electronics, easy processing, having enhanced performance. Organic-inorganic hybrid perovskites which combine the properties of organic and inorganic semiconductors are hopeful candidates for future opto-electronic devices. The exciton binding energies and oscillator strengths are very large in these systems making the applications at room temperature possible.In this thesis, we study the flexibility and photostability the (R-NH3)2PbX4perovskites. By modifying R structure, perovskites with optimized PL efficiency, surface roughness and photostability are discovered. We develop also some methodologies to fabricate crystal bulks and nanoparticles of perovskites, and we create new mixed perovskite crystals:(RNH3)2PbYxX4-x and AB-(NH3)2PbX4. These crystals exhibiting average properties of their precursors enlarge the possibility of energy band tuning and properties tailoring of perovskites. With the smooth photo-stable layer:4FPEPI doped PMMA we created, a λ-cavity has been realized. Strong coupling with large Rabi splitting of90meV is evidenced at room temperature.