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Title: Tailored interfaces of unencapsulated perovskite solar cells for >1,000 hour operational stability

Long-term device stability is the most pressing issue that impedes perovskite solar cell commercialization, given the achieved 22.7% efficiency. The perovskite absorber material itself has been heavily scrutinized for being prone to degradation by water, oxygen and ultraviolet light. To date, most reports characterize device stability in the absence of these extrinsic factors. Here we show that, even under the combined stresses of light (including ultraviolet light), oxygen and moisture, perovskite solar cells can retain 94% of peak efficiency despite 1,000 hours of continuous unencapsulated operation in ambient air conditions (relative humidity of 10-20%). Each interface and contact layer throughout the device stack plays an important role in the overall stability which, when appropriately modified, yields devices in which both the initial rapid decay (often termed burn-in) and the gradual slower decay are suppressed. This extensively modified device architecture and the understanding developed will lead towards durable long-term device performance.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ;  [2] ; ORCiD logo [2] ; ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [3] ; ORCiD logo [1] ; ORCiD logo [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. Colorado School of Mines, Golden, CO (United States)
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States); Colorado School of Mines, Golden, CO (United States)
Publication Date:
Report Number(s):
NREL/JA-5900-68531
Journal ID: ISSN 2058-7546
Grant/Contract Number:
AC36-08GO28308
Type:
Accepted Manuscript
Journal Name:
Nature Energy
Additional Journal Information:
Journal Volume: 3; Journal Issue: 1; Journal ID: ISSN 2058-7546
Publisher:
Nature Publishing Group
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; perovskite solar cells; efficiency; stability
OSTI Identifier:
1419410

Christians, Jeffrey A., Schulz, Philip, Tinkham, Jonathan S., Schloemer, Tracy H., Harvey, Steven P., Tremolet de Villers, Bertrand J., Sellinger, Alan, Berry, Joseph J., and Luther, Joseph M.. Tailored interfaces of unencapsulated perovskite solar cells for >1,000 hour operational stability. United States: N. p., Web. doi:10.1038/s41560-017-0067-y.
Christians, Jeffrey A., Schulz, Philip, Tinkham, Jonathan S., Schloemer, Tracy H., Harvey, Steven P., Tremolet de Villers, Bertrand J., Sellinger, Alan, Berry, Joseph J., & Luther, Joseph M.. Tailored interfaces of unencapsulated perovskite solar cells for >1,000 hour operational stability. United States. doi:10.1038/s41560-017-0067-y.
Christians, Jeffrey A., Schulz, Philip, Tinkham, Jonathan S., Schloemer, Tracy H., Harvey, Steven P., Tremolet de Villers, Bertrand J., Sellinger, Alan, Berry, Joseph J., and Luther, Joseph M.. 2017. "Tailored interfaces of unencapsulated perovskite solar cells for >1,000 hour operational stability". United States. doi:10.1038/s41560-017-0067-y.
@article{osti_1419410,
title = {Tailored interfaces of unencapsulated perovskite solar cells for >1,000 hour operational stability},
author = {Christians, Jeffrey A. and Schulz, Philip and Tinkham, Jonathan S. and Schloemer, Tracy H. and Harvey, Steven P. and Tremolet de Villers, Bertrand J. and Sellinger, Alan and Berry, Joseph J. and Luther, Joseph M.},
abstractNote = {Long-term device stability is the most pressing issue that impedes perovskite solar cell commercialization, given the achieved 22.7% efficiency. The perovskite absorber material itself has been heavily scrutinized for being prone to degradation by water, oxygen and ultraviolet light. To date, most reports characterize device stability in the absence of these extrinsic factors. Here we show that, even under the combined stresses of light (including ultraviolet light), oxygen and moisture, perovskite solar cells can retain 94% of peak efficiency despite 1,000 hours of continuous unencapsulated operation in ambient air conditions (relative humidity of 10-20%). Each interface and contact layer throughout the device stack plays an important role in the overall stability which, when appropriately modified, yields devices in which both the initial rapid decay (often termed burn-in) and the gradual slower decay are suppressed. This extensively modified device architecture and the understanding developed will lead towards durable long-term device performance.},
doi = {10.1038/s41560-017-0067-y},
journal = {Nature Energy},
number = 1,
volume = 3,
place = {United States},
year = {2017},
month = {11}
}

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Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites
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Carbon Nanotube/Polymer Composites as a Highly Stable Hole Collection Layer in Perovskite Solar Cells
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