Jump to main content
Jump to site search


Modulating the grain size, phase and optoelectronic quality of perovskite films with cesium iodide for high-performance solar cells

Author affiliations

Abstract

The formation of smooth, dense, and uniform perovskite layers on substrates is crucial for achieving high-performance perovskite devices. Here, we show that the introduction of a small concentration of cesium iodide to the precursor solution has a considerable effect on the morphology, phase and optoelectronic properties of CH3NH3PbI3-based perovskite films. An optimized concentration of 3% produces a high-quality perovskite film with a large grain size of ∼1.8 μm and a root mean square roughness of 5.917 nm. The improved morphology and high optoelectronic quality of the perovskite layer were verified by SEM, AFM, XRD, and UV-visible, photoluminescence and electrochemical impedance spectroscopy. The defect-free thin perovskite layer enables the fabrication of a mesoscopic CH3NH3PbI3-based perovskite device under ambient conditions, with a maximum power conversion efficiency of ∼19% with negligible hysteresis and high reproducibility. This method can be extended to other complexes of perovskite used in the present state-of-the-art perovskite solar cells.

Graphical abstract: Modulating the grain size, phase and optoelectronic quality of perovskite films with cesium iodide for high-performance solar cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Jun 2018, accepted on 29 Jun 2018 and first published on 29 Jun 2018


Article type: Paper
DOI: 10.1039/C8TC02923G
Citation: J. Mater. Chem. C, 2018, Advance Article
  •   Request permissions

    Modulating the grain size, phase and optoelectronic quality of perovskite films with cesium iodide for high-performance solar cells

    S. Sidhik, A. C. Pasarán, C. Rosiles Pérez, T. López-Luke and E. De la Rosa, J. Mater. Chem. C, 2018, Advance Article , DOI: 10.1039/C8TC02923G

Search articles by author

Spotlight

Advertisements