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Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance

Byung-wook Park, Bertrand Philippe, Sagar Jain, Xiaoliang Zhang, Tomas Edvinsson, Håkan Rensmo, Burkhard Zietz, Gerrit Boschloo

J. Mater. Chem. A, Volume: 3, Issue: 43, Pages: 21760 - 21771

Swansea University Author: Sagar Jain

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DOI (Published version): 10.1039/C5TA05470B

Abstract

Hybrid (organic–inorganic) lead trihalide perovskites have attracted much attention in recent years due to their exceptionally promising potential for application in solar cells. Here a controlled one-step method is presented where PbCl2 is combined with three equivalents methylammonium halide (MAX,...

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Published in: J. Mater. Chem. A
ISSN: 2050-7488 2050-7496
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa32898
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spelling 2017-04-06T11:51:06.1116336 v2 32898 2017-04-02 Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance 7073e179bb5b82db3e3efd3a8cd07139 Sagar Jain Sagar Jain true false 2017-04-02 EEN Hybrid (organic–inorganic) lead trihalide perovskites have attracted much attention in recent years due to their exceptionally promising potential for application in solar cells. Here a controlled one-step method is presented where PbCl2 is combined with three equivalents methylammonium halide (MAX, with X = I and/or Br) in polar solvents to form MAPb(I1−xBrx)3 perovskite films upon annealing in air at 145 °C. The procedure allows for a linear increment of the semiconductor bandgap from 1.60 eV to 2.33 eV by increasing the Br content. A transition from a tetragonal to a cubic structure is found when the Br fraction is larger than 0.3. X-ray photoelectron spectroscopy investigations shows that the increase of Br content is accompanied by a shift of the valence band edge to lower energy. Simultaneously, the conduction band moves to higher energy, but this shift is less pronounced. Time-resolved single-photon counting experiments of the perovskite materials on mesoporous TiO2 show faster decay kinetics for Br containing perovskites, indicative of improved electron injection into TiO2. Interestingly, kinetics of MAPbI2.7Br0.3Cly on TiO2 scaffold became faster after prolonged excitation during the measurement. In solar cell devices, MAPbI2.7Br0.3Cly yielded best performance, giving more than 14% power conversion efficiency when used in combination with an n-type contact consisting of fluorine-doped tinoxide glass coated with dense TiO2 and a mesoporous Al2O3 scaffold, and a p-type contact, spiro-MeOTAD/Ag. Journal Article J. Mater. Chem. A 3 43 21760 21771 2050-7488 2050-7496 31 12 2015 2015-12-31 10.1039/C5TA05470B COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2017-04-06T11:51:06.1116336 2017-04-02T00:35:46.8015525 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Byung-wook Park 1 Bertrand Philippe 2 Sagar Jain 3 Xiaoliang Zhang 4 Tomas Edvinsson 5 Håkan Rensmo 6 Burkhard Zietz 7 Gerrit Boschloo 8
title Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance
spellingShingle Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance
Sagar Jain
title_short Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance
title_full Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance
title_fullStr Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance
title_full_unstemmed Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance
title_sort Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance
author_id_str_mv 7073e179bb5b82db3e3efd3a8cd07139
author_id_fullname_str_mv 7073e179bb5b82db3e3efd3a8cd07139_***_Sagar Jain
author Sagar Jain
author2 Byung-wook Park
Bertrand Philippe
Sagar Jain
Xiaoliang Zhang
Tomas Edvinsson
Håkan Rensmo
Burkhard Zietz
Gerrit Boschloo
format Journal article
container_title J. Mater. Chem. A
container_volume 3
container_issue 43
container_start_page 21760
publishDate 2015
institution Swansea University
issn 2050-7488
2050-7496
doi_str_mv 10.1039/C5TA05470B
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 0
active_str 0
description Hybrid (organic–inorganic) lead trihalide perovskites have attracted much attention in recent years due to their exceptionally promising potential for application in solar cells. Here a controlled one-step method is presented where PbCl2 is combined with three equivalents methylammonium halide (MAX, with X = I and/or Br) in polar solvents to form MAPb(I1−xBrx)3 perovskite films upon annealing in air at 145 °C. The procedure allows for a linear increment of the semiconductor bandgap from 1.60 eV to 2.33 eV by increasing the Br content. A transition from a tetragonal to a cubic structure is found when the Br fraction is larger than 0.3. X-ray photoelectron spectroscopy investigations shows that the increase of Br content is accompanied by a shift of the valence band edge to lower energy. Simultaneously, the conduction band moves to higher energy, but this shift is less pronounced. Time-resolved single-photon counting experiments of the perovskite materials on mesoporous TiO2 show faster decay kinetics for Br containing perovskites, indicative of improved electron injection into TiO2. Interestingly, kinetics of MAPbI2.7Br0.3Cly on TiO2 scaffold became faster after prolonged excitation during the measurement. In solar cell devices, MAPbI2.7Br0.3Cly yielded best performance, giving more than 14% power conversion efficiency when used in combination with an n-type contact consisting of fluorine-doped tinoxide glass coated with dense TiO2 and a mesoporous Al2O3 scaffold, and a p-type contact, spiro-MeOTAD/Ag.
published_date 2015-12-31T03:40:28Z
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score 11.035874

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