Dear Colleagues,

Hybrid organic–inorganic perovskites triggered an impressive excitement in the field of photovoltaics since the first evidence of efficient use of MAPbI₃ as absorber in 2009. The search for new materials and photovoltaics cell architectures pushed the efficiency of perovskite-based solar cells to 22.1% in 2016. At the same time, analogous materials and new fully inorganic perovskites were shown to be excellent candidates for optical applications, such as light-emitting diodes and lasers. All these experimental achievements, together with theoretical modelling, opened several questions and concerns that still need to be solved, such as the long-term stability of perovskite solar cells, the presence of toxic lead, the ion migration issue, etc. The actual state-of-the-art, on both device design and materials chemistry, is quite mature, but efforts should be made in order to solve the above-mentioned, and other issues. Other important aspects to be considered are the characterization methods of solar cell performance and the fundamental physical and chemical properties of these materials. This Special Issue aims at collecting papers that review the actual status and future directions of hybrid organic–inorganic perovskites topic, from both basic and applied points of view, as well research papers reporting new achievements in this field.

Prof. Dr. Lorenzo Malavasi
Guest Editor

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• Hybrid organic–inorganic perovskites

• Inorganic perovskites

• Metal halide perovskites

• Photovoltaics

• Ion conductivity

• Stability

• LED

• Solar cells

• Crystal structure

• Theoretical modelling

• Spectroscopy