Progress in organic-inorganic hybrid halide perovskite single crystal: growth techniques and applications

As a new generation of solution-processable optoelectronic materials, organic-inorganic hybrid halide perovskites have attracted a great deal of interest due to their high and balanced carrier mobility, long carrier diffusion length and large light absorption coefficient. These materials have demonstrated wide applications in solar cell, light-emitting diode, laser, photodetector, catalysis and other fields. Comparing with their polycrystalline film counterpart, perovskite single crystals have low trap density and no grain boundaries and thus are anticipated to possess much better optoelectronic performances. Herein, we review the key progress in the development of organic-inorganic halide perovskite single crystals. Particularly, the crystal growth techniques and applications of these advanced materials are highlighted.