Benign methylformamidinium byproduct induced by cation heterogeneity inhibits local formation of δ-phase perovskites
Jihoo Lim, Jaehui Kim, Josh Davies-Jones, Mohsen Danaie, Eun Young Choi, Hongjae Shim, Liang Chen, Jincheol Kim, Judy S. Kim, Philip R. Davies, Jan Seidel, Martin A. Green, Samuel D. Stranks, Sang Il Seok, Jae Sung Yun
Abstract
Methylammonium chloride (MACl) selectively promotes the formation of N -methylformamidinium (MFA + )PbI 3 at grain boundaries (GBs) and as clusters near GBs while suppress the formation of δ-FAPbI 3.
Topics & Concepts
Phase (matter)Chemical engineeringMaterials scienceChemistryOrganic chemistryEngineeringPerovskite Materials and ApplicationsThermal Expansion and Ionic ConductivitySolid-state spectroscopy and crystallography