IMF2017

Organic and inorganic hybrid perovskites (e.g., CH₃NH₃PbBr₃), with advantages of simplistic processing techniques, tunable bandgaps, and superior charge-transfer properties, have emerged as a new class of innovatory optoelectronic semiconductors promising for various applications including light-emitting diodes, photodetectors, and transistors. Perovskite solar cells fabricated with a variety of configurations have demonstrated unparalleled progress in efficiency in the recent past, reaching more than 20% from multiple research groups around the world. Both experimental and theoretical investigations on this hybrid perovskites have enabled some critical fundamental understandings of this hybrid system. There are major challenges for further research on halide perovskites including basic chemical and crystal structures, chemical synthesis of bulk/nanocrystals and thin films, device configurations, operation principles for various optoelectronic applications with a focus on solar cells. To broaden and boost their optoelectronic and photovoltaic performance, it is highly desirable and necessary to grow single crystal of organo-lead trihalide hybrid perovskites and investigate electronic and optical properties. Single crystals of hybrid perovskites should have long carrier diffusion lengths and remarkably low-trap densities than their polycrystalline thin film counterpart. There have been limited studies to comprehend the basic properties of resulting single crystals. Our present study presents the simple process of single crystal growth and offers a material platform for fundamental investigation of structural, electronic, and optical properties of perovskite materials such as methyl ammonium lead bromide (CH₃NH₃PbBr₃).