Reducing Saturation-Current Density to Realize High-Efficiency Low-Bandgap Mixed Tin-Lead Halide Perovskite Solar Cells
Abstract
Abstract The unsatisfactory performance of low‐bandgap mixed tin (Sn)–lead (Pb) halide perovskite subcells has been one of the major obstacles hindering the progress of the power conversion efficiencies (PCEs) of all‐perovskite tandem solar cells. By analyzing dark‐current density and distribution, it is identified that charge recombination at grain boundaries is a key factor limiting the performance of low‐bandgap mixed Sn–Pb halide perovskite subcells. It is further found that bromine (Br) incorporation can effectively passivate grain boundaries and lower the dark current density by two–three orders of magnitude. By optimizing the Br concentration, low‐bandgap (1.272 eV) mixed Sn–Pb halide perovskite solar cells are fabricated with open‐circuit voltage deficits as low as 0.384 V and fill factors as high as 75%. The best‐performing device demonstrates a PCE of >19%. The results suggest an important direction for improving the performance of low‐bandgap mixed Sn–Pb halide perovskite solar cells.
- Authors:
-
- Univ. of Toledo, OH (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S). SunShot Initiative; USDOE
- OSTI Identifier:
- 1487330
- Alternate Identifier(s):
- OSTI ID: 1483438
- Report Number(s):
- NREL/JA-5K00-72548
Journal ID: ISSN 1614-6832
- Grant/Contract Number:
- AC36-08GO28308; FOA‐0000990; DE‐FOA‐0000990; DE‐AC36‐08‐GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Energy Materials
- Additional Journal Information:
- Journal Volume: 2018; Journal Issue: none; Journal ID: ISSN 1614-6832
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 36 MATERIALS SCIENCE; dark saturation current; grain boundary passivation; low-bandgap perovskites; perovskite solar cells
Citation Formats
Li, Chongwen, Song, Zhaoning, Zhao, Dewei, Xiao, Chuanxiao, Subedi, Biwas, Shrestha, Niraj, Junda, Maxwell M., Wang, Changlei, Jiang, Chun-Sheng, Al-Jassim, Mowafak, Ellingson, Randy J., Podraza, Nikolas J., Zhu, Kai, and Yan, Yanfa. Reducing Saturation-Current Density to Realize High-Efficiency Low-Bandgap Mixed Tin-Lead Halide Perovskite Solar Cells. United States: N. p., 2018.
Web. doi:10.1002/aenm.201803135.
Li, Chongwen, Song, Zhaoning, Zhao, Dewei, Xiao, Chuanxiao, Subedi, Biwas, Shrestha, Niraj, Junda, Maxwell M., Wang, Changlei, Jiang, Chun-Sheng, Al-Jassim, Mowafak, Ellingson, Randy J., Podraza, Nikolas J., Zhu, Kai, & Yan, Yanfa. Reducing Saturation-Current Density to Realize High-Efficiency Low-Bandgap Mixed Tin-Lead Halide Perovskite Solar Cells. United States. https://doi.org/10.1002/aenm.201803135
Li, Chongwen, Song, Zhaoning, Zhao, Dewei, Xiao, Chuanxiao, Subedi, Biwas, Shrestha, Niraj, Junda, Maxwell M., Wang, Changlei, Jiang, Chun-Sheng, Al-Jassim, Mowafak, Ellingson, Randy J., Podraza, Nikolas J., Zhu, Kai, and Yan, Yanfa. Tue .
"Reducing Saturation-Current Density to Realize High-Efficiency Low-Bandgap Mixed Tin-Lead Halide Perovskite Solar Cells". United States. https://doi.org/10.1002/aenm.201803135. https://www.osti.gov/servlets/purl/1487330.
@article{osti_1487330,
title = {Reducing Saturation-Current Density to Realize High-Efficiency Low-Bandgap Mixed Tin-Lead Halide Perovskite Solar Cells},
author = {Li, Chongwen and Song, Zhaoning and Zhao, Dewei and Xiao, Chuanxiao and Subedi, Biwas and Shrestha, Niraj and Junda, Maxwell M. and Wang, Changlei and Jiang, Chun-Sheng and Al-Jassim, Mowafak and Ellingson, Randy J. and Podraza, Nikolas J. and Zhu, Kai and Yan, Yanfa},
abstractNote = {Abstract The unsatisfactory performance of low‐bandgap mixed tin (Sn)–lead (Pb) halide perovskite subcells has been one of the major obstacles hindering the progress of the power conversion efficiencies (PCEs) of all‐perovskite tandem solar cells. By analyzing dark‐current density and distribution, it is identified that charge recombination at grain boundaries is a key factor limiting the performance of low‐bandgap mixed Sn–Pb halide perovskite subcells. It is further found that bromine (Br) incorporation can effectively passivate grain boundaries and lower the dark current density by two–three orders of magnitude. By optimizing the Br concentration, low‐bandgap (1.272 eV) mixed Sn–Pb halide perovskite solar cells are fabricated with open‐circuit voltage deficits as low as 0.384 V and fill factors as high as 75%. The best‐performing device demonstrates a PCE of >19%. The results suggest an important direction for improving the performance of low‐bandgap mixed Sn–Pb halide perovskite solar cells.},
doi = {10.1002/aenm.201803135},
journal = {Advanced Energy Materials},
number = none,
volume = 2018,
place = {United States},
year = {Tue Nov 27 00:00:00 EST 2018},
month = {Tue Nov 27 00:00:00 EST 2018}
}
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