Anisotropic optoelectronic performances on (112) and (100) lattice plane of perovskite MAPbI3 single crystal

Organic-inorganic hybrid methylammonium lead iodide perovskite (MAPbI3) is considered as new generation optoelectronic material. MAPbI3 single crystal is proved more excellent than its polycrystalline film and nano state counterparts, though the discrepancy is still pending. Referring MAPbI3 single crystal applications, physical anisotropy stands in its breach. However, it has not been drawn enough attentions till now. In this study, taking advantages of the natural exposed (100) and (112) facets of MAPbI3 single crystal grown from γ-butyrolactone (GBL) solution, the anisotropic optoelectronic performances based on of these two lattice planes were systematically explored through planar metal-semiconductor-metal (MSM) devices. An order enhanced photocurrents, 135% increased responsivity, and 128% heightened EQE on (112) plane device than those on (100) plane device under 5 V bias with irradiation power of 1 mW, remarkably demonstrated that (112) plane was more excellent in optoelectronic performances and light harvesting capability.