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The effect of oxygen on the efficiency of planar p–i–n metal halide perovskite solar cells with a PEDOT:PSS hole transport layer

Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is frequently used as hole transport layer in planar p–i–n perovskite solar cells. Here we show that processing of a metal halide perovskite layer on top of PEDOT:PSS via spin coating of a precursor solution chemically reduces the ox...

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Autores principales: Bruijnaers, Bardo J., Schiepers, Eric, Weijtens, Christ H. L., Meskers, Stefan C. J., Wienk, Martijn M., Janssen, René A. J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6003544/
https://www.ncbi.nlm.nih.gov/pubmed/30009025
http://dx.doi.org/10.1039/c7ta11128b
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author Bruijnaers, Bardo J.
Schiepers, Eric
Weijtens, Christ H. L.
Meskers, Stefan C. J.
Wienk, Martijn M.
Janssen, René A. J.
author_facet Bruijnaers, Bardo J.
Schiepers, Eric
Weijtens, Christ H. L.
Meskers, Stefan C. J.
Wienk, Martijn M.
Janssen, René A. J.
author_sort Bruijnaers, Bardo J.
collection PubMed
description Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is frequently used as hole transport layer in planar p–i–n perovskite solar cells. Here we show that processing of a metal halide perovskite layer on top of PEDOT:PSS via spin coating of a precursor solution chemically reduces the oxidation state of PEDOT:PSS. This reduction leads to a lowering of the work function of the PEDOT:PSS and the perovskite layer on top of it. As a consequence, the solar cells display inferior performance with a reduced open-circuit voltage and a reduced short-circuit current density, which increases sublinearly with light intensity. The reduced PEDOT:PSS can be re-oxidized by thermal annealing of the PEDOT:PSS/perovskite layer stack in the presence of oxygen. As a consequence, thermal annealing of the perovskite layer in air provides solar cells with increased open-circuit voltage, short-circuit current density and high efficiency.
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spelling pubmed-60035442018-07-11 The effect of oxygen on the efficiency of planar p–i–n metal halide perovskite solar cells with a PEDOT:PSS hole transport layer Bruijnaers, Bardo J. Schiepers, Eric Weijtens, Christ H. L. Meskers, Stefan C. J. Wienk, Martijn M. Janssen, René A. J. J Mater Chem A Mater Chemistry Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is frequently used as hole transport layer in planar p–i–n perovskite solar cells. Here we show that processing of a metal halide perovskite layer on top of PEDOT:PSS via spin coating of a precursor solution chemically reduces the oxidation state of PEDOT:PSS. This reduction leads to a lowering of the work function of the PEDOT:PSS and the perovskite layer on top of it. As a consequence, the solar cells display inferior performance with a reduced open-circuit voltage and a reduced short-circuit current density, which increases sublinearly with light intensity. The reduced PEDOT:PSS can be re-oxidized by thermal annealing of the PEDOT:PSS/perovskite layer stack in the presence of oxygen. As a consequence, thermal annealing of the perovskite layer in air provides solar cells with increased open-circuit voltage, short-circuit current density and high efficiency. Royal Society of Chemistry 2018-04-28 2018-03-29 /pmc/articles/PMC6003544/ /pubmed/30009025 http://dx.doi.org/10.1039/c7ta11128b Text en This journal is © The Royal Society of Chemistry 2018 http://creativecommons.org/licenses/by-nc/3.0/ This article is freely available. This article is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported Licence (CC BY-NC 3.0)
spellingShingle Chemistry
Bruijnaers, Bardo J.
Schiepers, Eric
Weijtens, Christ H. L.
Meskers, Stefan C. J.
Wienk, Martijn M.
Janssen, René A. J.
The effect of oxygen on the efficiency of planar p–i–n metal halide perovskite solar cells with a PEDOT:PSS hole transport layer
title The effect of oxygen on the efficiency of planar p–i–n metal halide perovskite solar cells with a PEDOT:PSS hole transport layer
title_full The effect of oxygen on the efficiency of planar p–i–n metal halide perovskite solar cells with a PEDOT:PSS hole transport layer
title_fullStr The effect of oxygen on the efficiency of planar p–i–n metal halide perovskite solar cells with a PEDOT:PSS hole transport layer
title_full_unstemmed The effect of oxygen on the efficiency of planar p–i–n metal halide perovskite solar cells with a PEDOT:PSS hole transport layer
title_short The effect of oxygen on the efficiency of planar p–i–n metal halide perovskite solar cells with a PEDOT:PSS hole transport layer
title_sort effect of oxygen on the efficiency of planar p–i–n metal halide perovskite solar cells with a pedot:pss hole transport layer
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6003544/
https://www.ncbi.nlm.nih.gov/pubmed/30009025
http://dx.doi.org/10.1039/c7ta11128b
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