Probing the structure–property–composition relationship in organic–inorganic tri-halide perovskites

Payne, Julia L. and Ni, Chengsheng and Harwell, Jonathon R. and Jagadamma, Lethy Krishnan and McDonald, Calum and Mariotti, Davide and Samuel, Ifor D. W. and Irvine, John T. S. (2018) Probing the structure–property–composition relationship in organic–inorganic tri-halide perovskites. Physical Chemistry Chemical Physics, 20 (31). pp. 20489-20496. ISSN 1463-9084 (https://doi.org/10.1039/c8cp01871e)

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Abstract

Here, we have synthesised a range of samples, with the formula (CH3NH3)1-2x(H3NC2H4NH3)xPbI3, with different levels of ethylenediammonium substitution to probe non-stoichiometry at the A-site of the perovskite. A single phase region was identified and is accompanied by a change in photophysical properties. The influence of aliovalent substitution with ethylenediammonium results in a decrease in HOMO level from -5.31 eV for x = 0 to -5.88 eV for x = 0.15.

ORCID iDs

Payne, Julia L., Ni, Chengsheng, Harwell, Jonathon R., Jagadamma, Lethy Krishnan, McDonald, Calum, Mariotti, Davide ORCID logoORCID: https://orcid.org/0000-0003-1504-4383, Samuel, Ifor D. W. and Irvine, John T. S.;
CORE (COnnecting REpositories)