Jump to main content
Jump to site search

Issue 2, 2019
Previous Article Next Article

Effect of chloride substitution on interfacial charge transfer processes in MAPbI3 perovskite thin film solar cells: planar versus mesoporous

Author affiliations

Abstract

For photovoltaic devices based on hybrid organic–inorganic perovskite thin films, the cell architecture is a vital parameter in defining the macroscopic performance. However, the understanding of the correlation between architecture and carrier dynamics in perovskite thin films has remained elusive. In this work, we utilize concerted materials characterization and optical measurements to investigate the role of chloride addition in PSC devices with two different architectures. Perovskite thin films, prepared with varying ratios of methylammonium halide MACl : MAI (0 : 1, 0.5 : 1, 1 : 1, and 2 : 1), were coated on either planar or mesoporous TiO2/FTO substrates. X-ray diffraction analysis reveals that with increasing the ratio of the Cl precursor, there is an increasing preferential directional growth of the perovskite film in both configurations. Time-resolved photoluminescence spectroscopy was applied to investigate the electron injection dynamics from the photoexcited perovskites to the TiO2. It is found that the interfacial electron injection rate from perovskite to planar TiO2 is accelerated with increasing Cl content, which explains the increased power conversion efficiencies using Cl-modified perovskites as photoactive materials. In contrast, Cl addition demonstrate no discernable influence on electron injection to mesoporous TiO2, suggesting the interfacial charge recombination rather than electron injection give rise to the improved performance observed in the mesoporous configuration. The results presented here, provide a deeper understanding of the mechanism of chloride addition to MAPbI3 solar cells with different architectures.

Graphical abstract: Effect of chloride substitution on interfacial charge transfer processes in MAPbI3 perovskite thin film solar cells: planar versus mesoporous

Back to tab navigation

Supplementary files

Article information


Submitted
30 Oct 2018
Accepted
15 Nov 2018
First published
16 Nov 2018

This article is Open Access

Nanoscale Adv., 2019,1, 827-833
Article type
Paper

Effect of chloride substitution on interfacial charge transfer processes in MAPbI3 perovskite thin film solar cells: planar versus mesoporous

Z. Li, C. Kolodziej, C. McCleese, L. Wang, A. Kovalsky, A. C. Samia, Y. Zhao and C. Burda, Nanoscale Adv., 2019, 1, 827
DOI: 10.1039/C8NA00317C

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

Reproduced material should be attributed as follows:

  • For reproduction of material from NJC:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
  • For reproduction of material from PCCP:
    [Original citation] - Published by the PCCP Owner Societies.
  • For reproduction of material from PPS:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
  • For reproduction of material from all other RSC journals:
    [Original citation] - Published by The Royal Society of Chemistry.

Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.


Social activity

Search articles by author

Spotlight

Advertisements