Organic lead halide perovskite has emerged as a key semiconductor for future photovoltaic technology. Although successful commercialisation requires a device lifetime of at least decades, the current benchmarked materials only last months due to their susceptibility to degradation. We study the phase formation and degradation mechanisms of these materials to further our understanding of the processing-structure-property relationships of these materials for the development of stable solar cells. In addition, we are also interested in photovoltaic smart glass to create an intelligent view of our future.