Crystalline grain engineered CsPbIBr2 films for indoor photovoltaics

Paheli Ghosh; Jochen Bruckbauer; Carol Trager-Cowan; Lethy Krishnan Jagadamma

doi:10.1016/j.apsusc.2022.152865

Crystalline grain engineered CsPbIBr₂ films for indoor photovoltaics

Paheli Ghosh, Jochen Bruckbauer, Carol Trager-Cowan, Lethy Krishnan Jagadamma^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Indoor photovoltaic devices have garnered profound research attention in recent years due to their prospects of powering ‘smart’ electronics for the Internet of Things (IoT). Here it is shown that all-inorganic Cs-based halide perovskites are promising for indoor light harvesting due to their wide bandgap matched to the indoor light spectra. Highly crystalline and compact CsPbIBr₂ perovskite based photovoltaic devices have demonstrated a power conversion efficiency (PCE) of 14.1% under indoor illumination of 1000 lx and 5.9% under 1 Sun. This study revealed that a reduction in grain misorientation, as well as suppression of defects in the form of metallic Pb in the perovskite film are crucial for maximising the photovoltaic properties of CsPbIBr₂ based devices. It was demonstrated that a pinhole free CsPbIBr₂/Spiro-OMeTAD interface preserves the perovskite α phase and enhances the air stability of the CsPbIBr₂ devices. These devices, despite being unencapsulated, retained > 55% of the maximum PCE even when stored under 30% relative humidity for a shelf-life duration of 40 days and is one of the best stability data reported so far for CsPbIBr₂ devices.

Original language	English
Article number	152865
Number of pages	10
Journal	Applied Surface Science
Volume	592
Early online date	6 Apr 2022
DOIs	https://doi.org/10.1016/j.apsusc.2022.152865
Publication status	Published - 1 Aug 2022

Keywords

All-inorganic perovskite
EBSD
Grain misorientation
Internet of Things
Mixed halides
XPS

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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© 2022 Crown Copyright. Published by Elsevier. All rights reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.apsusc.2022.152865.
Accepted author manuscript, 2.39 MBLicence: CC BY-NC-ND

Crystalline grain engineered CsPbIBr2 films for indoor photovoltaics
Ghosh, P. (Creator), Bruckbauer, J. (Creator), Trager-Cowan, C. (Creator) & Krishnan Jagadamma, L. (Creator), University of St Andrews, 26 Apr 2022
DOI: 10.17630/970ac996-d043-48f8-bf70-7c0eb33f7b9a
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abstract = "Indoor photovoltaic devices have garnered profound research attention in recent years due to their prospects of powering {\textquoteleft}smart{\textquoteright} electronics for the Internet of Things (IoT). Here it is shown that all-inorganic Cs-based halide perovskites are promising for indoor light harvesting due to their wide bandgap matched to the indoor light spectra. Highly crystalline and compact CsPbIBr2 perovskite based photovoltaic devices have demonstrated a power conversion efficiency (PCE) of 14.1% under indoor illumination of 1000 lx and 5.9% under 1 Sun. This study revealed that a reduction in grain misorientation, as well as suppression of defects in the form of metallic Pb in the perovskite film are crucial for maximising the photovoltaic properties of CsPbIBr2 based devices. It was demonstrated that a pinhole free CsPbIBr2/Spiro-OMeTAD interface preserves the perovskite α phase and enhances the air stability of the CsPbIBr2 devices. These devices, despite being unencapsulated, retained > 55% of the maximum PCE even when stored under 30% relative humidity for a shelf-life duration of 40 days and is one of the best stability data reported so far for CsPbIBr2 devices.",

keywords = "All-inorganic perovskite, EBSD, Grain misorientation, Internet of Things, Mixed halides, XPS",

author = "Paheli Ghosh and Jochen Bruckbauer and Carol Trager-Cowan and {Krishnan Jagadamma}, Lethy",

note = "Funding: LKJ acknowledges funding from UKRI-FLF through MR/T022094/1. LKJ and PG acknowledge Dr Ben F. Spencer for the XPS data acquisition, which was supported by the Henry Royce Institute, funded through UK EPSRC grants EP/R00661X/1, EP/P025021/1 and EP/P025498/1 and Dr Julia L. Payne for all the support with the XRD and FTIR measurements. JB and CTC acknowledge funding from UK EPSRC grant EP/P015719/1.",

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AU - Ghosh, Paheli

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AU - Krishnan Jagadamma, Lethy

N1 - Funding: LKJ acknowledges funding from UKRI-FLF through MR/T022094/1. LKJ and PG acknowledge Dr Ben F. Spencer for the XPS data acquisition, which was supported by the Henry Royce Institute, funded through UK EPSRC grants EP/R00661X/1, EP/P025021/1 and EP/P025498/1 and Dr Julia L. Payne for all the support with the XRD and FTIR measurements. JB and CTC acknowledge funding from UK EPSRC grant EP/P015719/1.

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N2 - Indoor photovoltaic devices have garnered profound research attention in recent years due to their prospects of powering ‘smart’ electronics for the Internet of Things (IoT). Here it is shown that all-inorganic Cs-based halide perovskites are promising for indoor light harvesting due to their wide bandgap matched to the indoor light spectra. Highly crystalline and compact CsPbIBr2 perovskite based photovoltaic devices have demonstrated a power conversion efficiency (PCE) of 14.1% under indoor illumination of 1000 lx and 5.9% under 1 Sun. This study revealed that a reduction in grain misorientation, as well as suppression of defects in the form of metallic Pb in the perovskite film are crucial for maximising the photovoltaic properties of CsPbIBr2 based devices. It was demonstrated that a pinhole free CsPbIBr2/Spiro-OMeTAD interface preserves the perovskite α phase and enhances the air stability of the CsPbIBr2 devices. These devices, despite being unencapsulated, retained > 55% of the maximum PCE even when stored under 30% relative humidity for a shelf-life duration of 40 days and is one of the best stability data reported so far for CsPbIBr2 devices.

AB - Indoor photovoltaic devices have garnered profound research attention in recent years due to their prospects of powering ‘smart’ electronics for the Internet of Things (IoT). Here it is shown that all-inorganic Cs-based halide perovskites are promising for indoor light harvesting due to their wide bandgap matched to the indoor light spectra. Highly crystalline and compact CsPbIBr2 perovskite based photovoltaic devices have demonstrated a power conversion efficiency (PCE) of 14.1% under indoor illumination of 1000 lx and 5.9% under 1 Sun. This study revealed that a reduction in grain misorientation, as well as suppression of defects in the form of metallic Pb in the perovskite film are crucial for maximising the photovoltaic properties of CsPbIBr2 based devices. It was demonstrated that a pinhole free CsPbIBr2/Spiro-OMeTAD interface preserves the perovskite α phase and enhances the air stability of the CsPbIBr2 devices. These devices, despite being unencapsulated, retained > 55% of the maximum PCE even when stored under 30% relative humidity for a shelf-life duration of 40 days and is one of the best stability data reported so far for CsPbIBr2 devices.

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KW - EBSD

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KW - Mixed halides

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JO - Applied Surface Science

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Crystalline grain engineered CsPbIBr2 films for indoor photovoltaics

Abstract

Keywords

UN SDGs

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