Recently, solution processed hybrid perovskites show intriguing electronic and optoelectronic properties applicable in various device application, and the developing of high quality materials is crucial. In this talk, three related aspects are discussed: 1) Establishing the controllable growth of multi-dimensional, low defect, high-quality perovskite crystals by tailoring the morphology and microstructure, and the particular relationship between structure and optoelectronic properties of perovskite materials; 2) Developing novel film growth process, defects passivation and interface engineering for perovskite materials and solar cells, to achieve high performance photovoltaics with certified efficiency of 24.5%; 3) Unveiling the degradation mechanism of hybrid perovskite films and devices under operational conditions. Corresponding methods are proposed to greatly improve the long-term stability of perovskite solar cells.
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