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Title: On-device lead sequestration for perovskite solar cells

Abstract

Perovskite solar cells, as an emerging high-efficiency and low-cost photovoltaic technology face challenges on their way towards commercialization. Substantial improvements have been made to device stability but potential issues with lead toxicity and leaching from devices remain relatively unexplored. The potential for lead leakage could be perceived as an environmental and public health risk when using perovskite solar cells in building-integrated photovoltaics. Here we present a chemical approach for on-device sequestration of more than 96 per cent of lead leakage caused by severe device damage. A coating of lead-absorbing material is applied to the front and back sides of the device stack. On the glass side of the front transparent conducting electrode, we use a transparent lead-absorbing molecular film containing phosphonic acid groups that bind strongly to lead. On the back (metal) electrode side, we place a polymer film blended with lead-chelating agents between the metal electrode and a standard photovoltaic packing film. The lead-absorbing films on both sides swell to absorb the lead, rather than dissolve, when subjected to water soaking, thus retaining structural integrity for easy collection of lead after damage.

Authors:
 [1];  [2];  [1];  [2];  [2];  [1]
  1. Northern Illinois Univ., DeKalb, IL (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
OSTI Identifier:
1602693
Report Number(s):
NREL/JA-5900-75297
Journal ID: ISSN 0028-0836
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Nature (London)
Additional Journal Information:
Journal Name: Nature (London); Journal Volume: 578; Journal Issue: 7796; Journal ID: ISSN 0028-0836
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; perovskite solar cells; sequestration

Citation Formats

Li, Xun, Zhang, Fei, He, Haiying, Berry, Joseph J., Zhu, Kai, and Xu, Tao. On-device lead sequestration for perovskite solar cells. United States: N. p., 2020. Web. doi:10.1038/s41586-020-2001-x.
Li, Xun, Zhang, Fei, He, Haiying, Berry, Joseph J., Zhu, Kai, & Xu, Tao. On-device lead sequestration for perovskite solar cells. United States. https://doi.org/10.1038/s41586-020-2001-x
Li, Xun, Zhang, Fei, He, Haiying, Berry, Joseph J., Zhu, Kai, and Xu, Tao. Wed . "On-device lead sequestration for perovskite solar cells". United States. https://doi.org/10.1038/s41586-020-2001-x. https://www.osti.gov/servlets/purl/1602693.
@article{osti_1602693,
title = {On-device lead sequestration for perovskite solar cells},
author = {Li, Xun and Zhang, Fei and He, Haiying and Berry, Joseph J. and Zhu, Kai and Xu, Tao},
abstractNote = {Perovskite solar cells, as an emerging high-efficiency and low-cost photovoltaic technology face challenges on their way towards commercialization. Substantial improvements have been made to device stability but potential issues with lead toxicity and leaching from devices remain relatively unexplored. The potential for lead leakage could be perceived as an environmental and public health risk when using perovskite solar cells in building-integrated photovoltaics. Here we present a chemical approach for on-device sequestration of more than 96 per cent of lead leakage caused by severe device damage. A coating of lead-absorbing material is applied to the front and back sides of the device stack. On the glass side of the front transparent conducting electrode, we use a transparent lead-absorbing molecular film containing phosphonic acid groups that bind strongly to lead. On the back (metal) electrode side, we place a polymer film blended with lead-chelating agents between the metal electrode and a standard photovoltaic packing film. The lead-absorbing films on both sides swell to absorb the lead, rather than dissolve, when subjected to water soaking, thus retaining structural integrity for easy collection of lead after damage.},
doi = {10.1038/s41586-020-2001-x},
journal = {Nature (London)},
number = 7796,
volume = 578,
place = {United States},
year = {2020},
month = {2}
}

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