Jump to main content
Jump to site search

Issue 17, 2015
Previous Article Next Article

Temperature dependence of hole conductor free formamidinium lead iodide perovskite based solar cells

Author affiliations

Abstract

Organometal halide perovskite is a promising material in photovoltaic (PV) cells. Within a short time, its performance has increased dramatically to become a real competitor to silicon solar cells. Here we report on the temperature dependence (annealing temperature and the dependence of the photovoltaic parameters on temperature) of formamidinium (FA) lead iodide (FAPbI3), methylammonium (MA) lead iodide (MAPbI3) and their mixture (MAPbI3 : FAPbI3) in hole conductor free perovskite solar cells. These three types of perovskites function both as light harvesters and as hole conductors. Surface photovoltage and optical characterization reveal the p-type behavior and the band gap of the different perovskites. We observed that the ratio between the MA and FA cations might change during the annealing process, affecting the band gap and the stability of the layers. The PV parameters at different temperatures show better stability for the pure MAPbI3 and FAPbI3 solar cells compared to their mixture. Using intensity modulated photovoltage/photocurrent spectroscopy, we found that the diffusion length is weakly dependent on the light intensity, while the charge collection efficiency drops with light intensity for the FAPbI3-based cells. However, for MAPbI3 and the mixture, the charge collection efficiency remains constant for a wide range of light intensities.

Graphical abstract: Temperature dependence of hole conductor free formamidinium lead iodide perovskite based solar cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Sep 2014, accepted on 14 Oct 2014 and first published on 14 Oct 2014


Article type: Paper
DOI: 10.1039/C4TA05149A
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2015,3, 9171-9178
  •   Request permissions

    Temperature dependence of hole conductor free formamidinium lead iodide perovskite based solar cells

    S. Aharon, A. Dymshits, A. Rotem and L. Etgar, J. Mater. Chem. A, 2015, 3, 9171
    DOI: 10.1039/C4TA05149A

Search articles by author

Spotlight

Advertisements