The complexity of hybrid organic perovskites calls for an innovative theoretical view that combines usually disconnected concepts in order to achieve a comprehensive picture: i) The intended applications of this class of materials are currently in the realm of conventional semiconductors, which reveal the key desired properties for the design of efficient devices. ii) The reorientational dynamics of the organic component resembles that observed in plastic crystals and therefore requiring a stochastic treatment that can be done in terms of pseudospins and rotator functions. iii) The overall structural similarity with all inorganic perovskites suggests the use of the high temperature pseudo cubic phase as the reference platform on which to build further refinements.  With the introduction of group theory as the main tool to rationalize the different ideas, several experimentally observed properties are explained with possible suggestions for future work. Comparisons with recent structural, optical and electrical characterizations of layered and bulk hybrid perovskites will be presented, as well as advanced results on photovoltaic devices.

Optoelectronic properties and molecular disorder in the plastic crystal phase of hybrid perovskites

251st National Meeting (2016)

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