CH3NH3PbI3 perovskite single crystals: surface photophysics and their interaction with the environment.
نویسندگان
چکیده
Here we identify structural inhomogeneity on a micrometer scale across the surface of a CH3NH3PbI3 perovskite single crystal. At the crystal edge a local distortion of the crystal lattice is responsible for a widening of the optical bandgap and faster photo-carrier recombination. These effects are inherently present at the edge of the crystal, and further enhanced upon water intercalation, as a preliminary step in the hydration of the perovskite material.
منابع مشابه
CH3NH3PbI3 perovskite single crystals: surface photophysics and their interaction with the environment† †Electronic supplementary information (ESI) available. See DOI: 10.1039/c5sc02542g Click here for additional data file.
†Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia, via Giovanni Pascoli 70/3, 20133, Milan, Italy. ┴Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci, 32, 20133 Milano, Italy ‡Department of Chemistry, Stanford University, 337 Campus Drive, Stanford, California 94305, USA ◊ Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), CNR-ISTM,...
متن کاملNarrow Linewidth Excitonic Emission in Organic-Inorganic Lead Iodide Perovskite Single Crystals.
Hybrid perovskite thin films have demonstrated impressive performance for solar energy conversion and optoelectronic applications. However, further progress will benefit from a better knowledge of the intrinsic photophysics of materials. Here, the temperature-dependent emission properties of CH3NH3PbI3 single crystals are investigated and compared to those of thin polycrystalline films by means...
متن کاملSolar cells. Electron-hole diffusion lengths > 175 μm in solution-grown CH3NH3PbI3 single crystals.
Long, balanced electron and hole diffusion lengths greater than 100 nanometers in the polycrystalline organolead trihalide compound CH3NH3PbI3 are critical for highly efficient perovskite solar cells. We found that the diffusion lengths in CH3NH3PbI3 single crystals grown by a solution-growth method can exceed 175 micrometers under 1 sun (100 mW cm(-2)) illumination and exceed 3 millimeters und...
متن کاملFunction Follows Form: Correlation between the Growth and Local Emission of Perovskite Structures and the Performance of Solar Cells
Understanding the relationship between the growth and local emission of hybrid perovskite structures and the performance of the devices based on them demands attention. This study investigates the local structural and emission features of CH3NH3PbI3, CH3NH3PbBr3, and CH(NH2)2PbBr3 perovskite films deposited under different yet optimized conditions using X-ray scattering and cathodoluminescence ...
متن کاملافزایش پایداری سلول‌های خورشیدی با استفاده از لایه‌های جاذب پروسکایتی CH3NH3PbI3 آلاییده با برم
The CH3NH3PbI3 is one of the most widely used and famous lead halide perovskite absorber layer for using in perovskite solar cells. One of the ways to deal with the instability problem of this perovskite structure in environmental condition is bromide doping in this composition. In this work, the structural and optical properties of the bromide doped CH3NH3PbI3 absorber layers were studied as w...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Chemical science
دوره 6 12 شماره
صفحات -
تاریخ انتشار 2015