Reversible Hydration of CH3NH3PbI3 in Films, Single Crystals, and Solar Cells | Zendy

Aurélien M. A. Leguy | Zendy; Yinghong Hu | Zendy; Mariano CampoyQuiles | Zendy; M. I. Alonso | Zendy; Oliver J. Weber | Zendy; Pooya Azarhoosh | Zendy; Mark van Schilfgaarde | Zendy; Mark T. Weller | Zendy; Thomas Bein | Zendy; Jenny Nelson | Zendy; Pablo Docampo | Zendy; Piers R. F. Barnes | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Reversible Hydration of CH₃NH₃PbI₃ in Films, Single Crystals, and Solar Cells

Author(s) -

Aurélien M. A. Leguy,

Yinghong Hu,

Mariano CampoyQuiles,

M. I. Alonso,

Oliver J. Weber,

Pooya Azarhoosh,

Mark van Schilfgaarde,

Mark T. Weller,

Thomas Bein,

Jenny Nelson,

Pablo Docampo,

Piers R. F. Barnes

Publication year - 2015

Publication title -

chemistry of materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.741

H-Index - 375

eISSN - 1520-5002

pISSN - 0897-4756

DOI - 10.1021/acs.chemmater.5b00660

Subject(s) - photocurrent , perovskite (structure) , materials science , ellipsometry , iodide , solar cell , analytical chemistry (journal) , hysteresis , thin film , band gap , phase (matter) , open circuit voltage , grain boundary , moisture , chemistry , crystallography , inorganic chemistry , optoelectronics , nanotechnology , organic chemistry , microstructure , voltage , physics , quantum mechanics , metallurgy , composite material

Solar cells composed of methylammonium lead iodide perovskite (MAPI) are notorious for their sensitivity to moisture. We show that (i) hydrated crystal phases are formed when MAPI is exposed to water vapor at room temperature and (ii) these phase changes are fully reversed when the material is subsequently dried. The reversible formation of CH3NH3PbI3·H2O followed by (CH3NH3)4PbI6·2H2O (upon long exposure times) was observed using time-resolved XRD and ellipsometry of thin films prepared using “solvent engineering”, single crystals, and state-of-the-art solar cells. In contrast to water vapor, the presence of liquid water results in the irreversible decomposition of MAPI to form PbI2. MAPI changes from dark brown to transparent on hydration; the precise optical constants of CH3NH3PbI3·H2O formed on single crystals were determined, with a bandgap at 3.1 eV. Using the single-crystal optical constants and thin-film ellipsometry measurements, the time-dependent changes to MAPI films exposed to moisture were m...

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research