Structural and thermodynamic limits of layer thickness in 2D halide perovskites.

ABSTRACT: In the fast-evolving field of halide perovskite semiconductors, the 2D perovskites (A')2(A) n-1M n X3n+1 [where A = Cs+, CH3NH3 +, HC(NH2)2 +; A' = ammonium cation acting as spacer; M = Ge2+, Sn2+, Pb2+; and X = Cl-, Br-, I-] have recently made a critical entry. The n value defines the thickness of the 2D layers, which controls the optical and electronic properties. The 2D perovskites have demonstrated preliminary optoelectronic device lifetime superior to their 3D counterparts. They have also attracted fundamental interest as solution-processed quantum wells with structural and physical properties tunable via chemical composition, notably by the n value defining the perovskite layer thickness. The higher members (n > 5) have not been documented, and there are important scientific question

SUBMITTER: Soe CMM 

PROVIDER: S-EPMC6320524 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature