Jump to main content
Jump to site search


HxMoO3−y nanobelts: an excellent alternative to carbon electrodes for high performance mesoscopic perovskite solar cells

Author affiliations

Abstract

Carbon-based hole-conductor-free perovskite solar cells (C-PSCs) are considered as a promising photovoltaic technology toward commercialization, owing to their low cost and superior stability. However, efforts to further improve their efficiency have been hampered by the hole-extraction barrier at the Schottky contact between carbon and the perovskite. A conventional approach to resolve this issue is incorporating a hole-transport material (HTM) into the mesoscopic skeleton or chemical modification of the carbon electrode. Here, we show an innovative strategy that uses solution-processed hydrogen molybdenum bronze (HxMoO3−y) nanobelts, an n-type HTM with high work function and electrical conductivity, as the sole electrode material to enhance the hole-extraction process and realize efficient PSCs for the first time. The mesoscopic cell configuration of FTO/c-TiO2/m-TiO2/m-Al2O3/HxMoO3−y with perovskite infiltration delivered a champion power conversion efficiency (PCE) of 14.5%, which compares favorably with 13.3% of typical high temperature C-PSCs. This increase in cell efficiency stems primarily from the enhancement in open circuit voltage and short circuit current, which is due to the HxMoO3−y electrode with more favorable energy alignment and higher hole-extraction ability than the carbon electrode. These results show the potential of HxMoO3−y nanobelts as an efficient electrode for realizing high-performance mesoscopic PSCs.

Graphical abstract: HxMoO3−y nanobelts: an excellent alternative to carbon electrodes for high performance mesoscopic perovskite solar cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Nov 2018, accepted on 07 Dec 2018 and first published on 08 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA10892G
Citation: J. Mater. Chem. A, 2019, Advance Article
  •   Request permissions

    HxMoO3−y nanobelts: an excellent alternative to carbon electrodes for high performance mesoscopic perovskite solar cells

    H. Zhang, H. Wang, Y. Yang, C. Hu, Y. Bai, T. Zhang, W. Chen and S. Yang, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA10892G

Search articles by author

Spotlight

Advertisements