ENGINEERING FRAGILITY OF HYBRID ORGANIC-INORGANIC PEROVSKITE FOR DIVERSE APPLICATIONS

Abstract

Strong optical absorption, long diffusion length, benign intrinsic defects established organic-inorganic hybrid perovskites as one of the most important materials in the area of photovoltaics. However, fragility in various environmental conditions acts as a major barrier for hybrid perovskites towards commercialization. Interestingly this thesis will reveal that vulnerability of hybrid perovskite structures can be a blessing in various aspects, achieving band tuning to developing sensory materials. Moreover, the long-standing problem of instability of hybrid perovskites (in aqueous electrolytes) is solved by placing a hydrophobic electron transport encapsulation. Most interestingly a tungsten-based Ruddlesden-popper and hybrid perovskite framework have been introduced which solved two major issues of instability and toxicity of HOIPs simultaneously. We believe this work will reinvigorate renewed exploration of diverse hybrid perovskite structures for different electrochemical devices, as the two most fundamentally difficult issues with regards to structural stability in electrolytes and toxicity have been resolved.