Issue 17, 2015

Structure and function relationships in alkylammonium lead(ii) iodide solar cells

Abstract

Alkylammonium lead(II) iodide materials (APbI3), based on the general formula of CH3–(CH2)n–NH3PbI3, may lead to a monumental leap in developing affordable photovoltaics. Herein, we correlate the structure and function relationships of alkylammonium lead(II) iodide in solar cells. We investigated changes in the structure of APbI3 materials by varying the alkylammonium cations in their structure. As the size of the alkylammonium cation increased, the crystallographic unit cell increased in size and yielded lower symmetry crystals. High symmetry materials, those with cubic symmetry, showed the highest conductivity, the smallest bandgap, and produced the best performing solar cells. Structural changes were investigated by X-ray crystallography, X-ray powder diffraction, and Raman scattering.

Graphical abstract: Structure and function relationships in alkylammonium lead(ii) iodide solar cells

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
14 11 2014
Accepted
22 12 2014
First published
23 12 2014

J. Mater. Chem. A, 2015,3, 9201-9207

Author version available

Structure and function relationships in alkylammonium lead(II) iodide solar cells

M. Safdari, A. Fischer, B. Xu, L. Kloo and J. M. Gardner, J. Mater. Chem. A, 2015, 3, 9201 DOI: 10.1039/C4TA06174H

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