Supplementary Information for Atomic Resolution Imaging of Halide Perovskites

Atomic Resolution Imaging of Halide Perovskites.

The radiation-sensitive nature of halide perovskites has hindered structural studies at the atomic scale. We overcome this obstacle by applying low dose-rate in-line holography, which combines aberration-corrected high-resolution transmission electron microscopy with exit-wave reconstruction. This technique successfully yields the genuine atomic structure of ultrathin two-dimensional CsPbBr3 ha...

Post-synthetic halide conversion and selective halogen capture in hybrid perovskites† †Electronic supplementary information (ESI) available. CCDC 1048945–1048947. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c5sc01135c

Reversible photo-induced trap formation in mixed-halide hybrid perovskites for photovoltaics† †Electronic supplementary information (ESI) available: Experimental details, PL, PDS spectra and XRD patterns. See DOI: 10.1039/c4sc03141e Click here for additional data file.

We report on reversible, light-induced transformations in (CH3NH3)Pb(BrxI1 x)3. Photoluminescence (PL) spectra of these perovskites develop a new, red-shifted peak at 1.68 eV that grows in intensity under constant, 1-sun illumination in less than a minute. This is accompanied by an increase in sub-bandgap absorption at 1.7 eV, indicating the formation of luminescent trap states. Light soaking c...

Supplementary information for: Experimental and theoretical optical properties of methylammonium lead halide perovskites

List of the supplementary material as called in the main text: Note S1 Detailed methods for sample preparation Note S2 Method for measuring sub-band gap external quantum efficiency Note S3 Method for measuring diffuse Reflectance Note S4 Details of the fitting procedure Note S5 The Bruggeman approximation Figure S1 Rescaled calculated optical constants obtained with QS-GW.

Ferroelectric Domain Wall Induced Band Gap Reduction and Charge Separation in Organometal Halide Perovskites.

Organometal halide perovskites have been intensely studied in the past 5 years, inspired by their certified high photovoltaic power conversion efficiency. Some of these materials are room-temperature ferroelectrics. The presence of switchable ferroelectric domains in methylammonium lead triiodide, CH3NH3PbI3, has recently been observed via piezoresponse force microscopy. Here, we focus on the s...