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Title: Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems

Abstract

Wide–band gap metal halide perovskites are promising semiconductors to pair with silicon in tandem solar cells to pursue the goal of achieving power conversion efficiency (PCE) greater than 30% at low cost. However, wide–band gap perovskite solar cells have been fundamentally limited by photoinduced phase segregation and low open-circuit voltage. We report efficient 1.67–electron volt wide–band gap perovskite top cells using triple-halide alloys (chlorine, bromine, iodine) to tailor the band gap and stabilize the semiconductor under illumination. We show a factor of 2 increase in photocarrier lifetime and charge-carrier mobility that resulted from enhancing the solubility of chlorine by replacing some of the iodine with bromine to shrink the lattice parameter. We observed a suppression of light-induced phase segregation in films even at 100-sun illumination intensity and less than 4% degradation in semitransparent top cells after 1000 hours of maximum power point (MPP) operation at 60°C. By integrating these top cells with silicon bottom cells, we achieved a PCE of 27% in two-terminal monolithic tandems with an area of 1 square centimeter.

Authors:
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Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1603222
Grant/Contract Number:  
[EE0008167; AC36-08GO23808]
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
[Journal Name: Science Journal Volume: 367 Journal Issue: 6482]; Journal ID: ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)
Country of Publication:
United States
Language:
English

Citation Formats

Xu, Jixian, Boyd, Caleb C., Yu, Zhengshan J., Palmstrom, Axel F., Witter, Daniel J., Larson, Bryon W., France, Ryan M., Werner, Jérémie, Harvey, Steven P., Wolf, Eli J., Weigand, William, Manzoor, Salman, van Hest, Maikel F. A. M., Berry, Joseph J., Luther, Joseph M., Holman, Zachary C., and McGehee, Michael D. Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems. United States: N. p., 2020. Web. doi:10.1126/science.aaz5074.
Xu, Jixian, Boyd, Caleb C., Yu, Zhengshan J., Palmstrom, Axel F., Witter, Daniel J., Larson, Bryon W., France, Ryan M., Werner, Jérémie, Harvey, Steven P., Wolf, Eli J., Weigand, William, Manzoor, Salman, van Hest, Maikel F. A. M., Berry, Joseph J., Luther, Joseph M., Holman, Zachary C., & McGehee, Michael D. Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems. United States. doi:10.1126/science.aaz5074.
Xu, Jixian, Boyd, Caleb C., Yu, Zhengshan J., Palmstrom, Axel F., Witter, Daniel J., Larson, Bryon W., France, Ryan M., Werner, Jérémie, Harvey, Steven P., Wolf, Eli J., Weigand, William, Manzoor, Salman, van Hest, Maikel F. A. M., Berry, Joseph J., Luther, Joseph M., Holman, Zachary C., and McGehee, Michael D. Thu . "Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems". United States. doi:10.1126/science.aaz5074.
@article{osti_1603222,
title = {Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems},
author = {Xu, Jixian and Boyd, Caleb C. and Yu, Zhengshan J. and Palmstrom, Axel F. and Witter, Daniel J. and Larson, Bryon W. and France, Ryan M. and Werner, Jérémie and Harvey, Steven P. and Wolf, Eli J. and Weigand, William and Manzoor, Salman and van Hest, Maikel F. A. M. and Berry, Joseph J. and Luther, Joseph M. and Holman, Zachary C. and McGehee, Michael D.},
abstractNote = {Wide–band gap metal halide perovskites are promising semiconductors to pair with silicon in tandem solar cells to pursue the goal of achieving power conversion efficiency (PCE) greater than 30% at low cost. However, wide–band gap perovskite solar cells have been fundamentally limited by photoinduced phase segregation and low open-circuit voltage. We report efficient 1.67–electron volt wide–band gap perovskite top cells using triple-halide alloys (chlorine, bromine, iodine) to tailor the band gap and stabilize the semiconductor under illumination. We show a factor of 2 increase in photocarrier lifetime and charge-carrier mobility that resulted from enhancing the solubility of chlorine by replacing some of the iodine with bromine to shrink the lattice parameter. We observed a suppression of light-induced phase segregation in films even at 100-sun illumination intensity and less than 4% degradation in semitransparent top cells after 1000 hours of maximum power point (MPP) operation at 60°C. By integrating these top cells with silicon bottom cells, we achieved a PCE of 27% in two-terminal monolithic tandems with an area of 1 square centimeter.},
doi = {10.1126/science.aaz5074},
journal = {Science},
number = [6482],
volume = [367],
place = {United States},
year = {2020},
month = {3}
}

Journal Article:
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DOI: 10.1126/science.aaz5074

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