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Title: Design of Low Bandgap Tin-Lead Halide Perovskite Solar Cells to Achieve Thermal, Atmospheric and Operational Stability

Abstract

Low bandgap tin-lead iodide perovskites are key components of all-perovskite tandem solar cells, but can be unstable because tin is prone to oxidation. Here, to avoid a reaction with the most popular hole contact, we eliminated polyethylenedioxythiophene:polystyrenesulfonate as a hole transport layer and instead used an upward band offset at an indium tin oxide-perovskite heterojunction to extract holes. To suppress oxidative degradation, we improved the morphology to create a compact and large-grained film. The tin content was kept at or below 50% and the device capped with a sputtered indium zinc oxide electrode. These advances resulted in a substantially improved thermal and environmental stability in a low bandgap perovskite solar cell without compromising the efficiency. The solar cells retained 95% of their initial efficiency after 1,000 h at 85 degrees C in air in the dark with no encapsulation and in a damp heat test (85 degrees C with 85% relative humidity) with encapsulation. The full initial efficiency was maintained under operation near the maximum power point and near 1 sun illumination for over 1,000 h.

Authors:
 [1];  [2];  [3];  [4];  [1];  [4];  [3];  [5];  [4];  [5];  [1]; ORCiD logo [5];  [4];  [5];  [5];  [3]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States); Stanford University
  2. National Renewable Energy Laboratory (NREL), Golden, CO (United States); Stanford University; Swift Solar
  3. National Renewable Energy Laboratory (NREL), Golden, CO (United States); University of Colorado, Boulder
  4. Stanford University
  5. National Renewable Energy Laboratory (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), Solar Energy Technologies Office (EE-4S); U.S. Department of Defense (DOD), Office of Naval Research
OSTI Identifier:
1578261
Report Number(s):
NREL/JA-5900-75597
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Journal Name:
Nature Energy
Additional Journal Information:
Journal Volume: 4
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; perovskite solar cells; low bandgap; hole transport layers

Citation Formats

Prasanna, Rohit, Leijtens, Tomas, Dunfield, Sean, Raiford, James A., Wolf, Eli J, Swifter, Simon A., Werner, Jeremie, Eperon, Giles E, de Paula, Camila, Palmstrom, Axel, Boyd, Caleb, Van Hest, Marinus F, Bent, Stacey F., Teeter, Glenn R, Berry, Joseph J, and McGehee, Michael. Design of Low Bandgap Tin-Lead Halide Perovskite Solar Cells to Achieve Thermal, Atmospheric and Operational Stability. United States: N. p., 2019. Web. doi:10.1038/s41560-019-0471-6.
Prasanna, Rohit, Leijtens, Tomas, Dunfield, Sean, Raiford, James A., Wolf, Eli J, Swifter, Simon A., Werner, Jeremie, Eperon, Giles E, de Paula, Camila, Palmstrom, Axel, Boyd, Caleb, Van Hest, Marinus F, Bent, Stacey F., Teeter, Glenn R, Berry, Joseph J, & McGehee, Michael. Design of Low Bandgap Tin-Lead Halide Perovskite Solar Cells to Achieve Thermal, Atmospheric and Operational Stability. United States. doi:10.1038/s41560-019-0471-6.
Prasanna, Rohit, Leijtens, Tomas, Dunfield, Sean, Raiford, James A., Wolf, Eli J, Swifter, Simon A., Werner, Jeremie, Eperon, Giles E, de Paula, Camila, Palmstrom, Axel, Boyd, Caleb, Van Hest, Marinus F, Bent, Stacey F., Teeter, Glenn R, Berry, Joseph J, and McGehee, Michael. Mon . "Design of Low Bandgap Tin-Lead Halide Perovskite Solar Cells to Achieve Thermal, Atmospheric and Operational Stability". United States. doi:10.1038/s41560-019-0471-6.
@article{osti_1578261,
title = {Design of Low Bandgap Tin-Lead Halide Perovskite Solar Cells to Achieve Thermal, Atmospheric and Operational Stability},
author = {Prasanna, Rohit and Leijtens, Tomas and Dunfield, Sean and Raiford, James A. and Wolf, Eli J and Swifter, Simon A. and Werner, Jeremie and Eperon, Giles E and de Paula, Camila and Palmstrom, Axel and Boyd, Caleb and Van Hest, Marinus F and Bent, Stacey F. and Teeter, Glenn R and Berry, Joseph J and McGehee, Michael},
abstractNote = {Low bandgap tin-lead iodide perovskites are key components of all-perovskite tandem solar cells, but can be unstable because tin is prone to oxidation. Here, to avoid a reaction with the most popular hole contact, we eliminated polyethylenedioxythiophene:polystyrenesulfonate as a hole transport layer and instead used an upward band offset at an indium tin oxide-perovskite heterojunction to extract holes. To suppress oxidative degradation, we improved the morphology to create a compact and large-grained film. The tin content was kept at or below 50% and the device capped with a sputtered indium zinc oxide electrode. These advances resulted in a substantially improved thermal and environmental stability in a low bandgap perovskite solar cell without compromising the efficiency. The solar cells retained 95% of their initial efficiency after 1,000 h at 85 degrees C in air in the dark with no encapsulation and in a damp heat test (85 degrees C with 85% relative humidity) with encapsulation. The full initial efficiency was maintained under operation near the maximum power point and near 1 sun illumination for over 1,000 h.},
doi = {10.1038/s41560-019-0471-6},
journal = {Nature Energy},
number = ,
volume = 4,
place = {United States},
year = {2019},
month = {10}
}

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