Perovskite Quantum Dot Solar Cells: Mapping Interfacial Energetics for Improving Charge Separation
Abstract
Colloidal halide perovskite nanocrystals or quantum dots (QDs) show similar defect tolerance as thin film perovskite materials with added nanoscale phenomena. Perovskite QD solar cells have demonstrated efficiencies of 16.6%, greater than that of any other QD material system. While the efficiency lags behind the best thin-film perovskite devices, these solar cells could have advantages over the thin-film versions in terms of processability, phase stability, and high open-circuit voltages. However, some operating principles behind perovskite quantum dot device stacks and the associated electric field properties are still unknown. Here, we characterize the junction structure within perovskite QD solar cells, by exposing functioning cross-sections and using nanometer-scale Kelvin probe force microscopy to offer insight into the selection and performance of charge selective contacts. We also evaluated various solar cell device architectures with different selective contacts to isolate the role of each junction in device performance. We show that in high-performance n-i-p architectures, both electron- and hole-transport layer (HTL) interfaces possess a strong electric field, but in the case of the inverted p-i-n architecture, we find that high interfacial recombination at the HTL/QD junction is responsible for subpar device performance. Perovskite QD and thin film materials can synergistically be combined to offermore »
- 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:
- 1670156
- Alternate Identifier(s):
- OSTI ID: 1658994
- Report Number(s):
- NREL/JA-5K00-77992
Journal ID: ISSN 2211-2855; MainId:31901;UUID:776e139f-f73f-4341-9e82-ee1748d4c768;MainAdminID:18618
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Energy
- Additional Journal Information:
- Journal Volume: 78; Journal ID: ISSN 2211-2855
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; charge selective contacts; junction structure; Kelvin probe force microscopy; perovskite quantum dot; solar cell
Citation Formats
Xiao, Chuanxiao, Zhao, Qian, Jiang, Chun-Sheng, Sun, Yinong, Al-Jassim, Mowafak M., Nanayakkara, Sanjini, and Luther, Joseph M. Perovskite Quantum Dot Solar Cells: Mapping Interfacial Energetics for Improving Charge Separation. United States: N. p., 2020.
Web. doi:10.1016/j.nanoen.2020.105319.
Xiao, Chuanxiao, Zhao, Qian, Jiang, Chun-Sheng, Sun, Yinong, Al-Jassim, Mowafak M., Nanayakkara, Sanjini, & Luther, Joseph M. Perovskite Quantum Dot Solar Cells: Mapping Interfacial Energetics for Improving Charge Separation. United States. https://doi.org/10.1016/j.nanoen.2020.105319
Xiao, Chuanxiao, Zhao, Qian, Jiang, Chun-Sheng, Sun, Yinong, Al-Jassim, Mowafak M., Nanayakkara, Sanjini, and Luther, Joseph M. Fri .
"Perovskite Quantum Dot Solar Cells: Mapping Interfacial Energetics for Improving Charge Separation". United States. https://doi.org/10.1016/j.nanoen.2020.105319. https://www.osti.gov/servlets/purl/1670156.
@article{osti_1670156,
title = {Perovskite Quantum Dot Solar Cells: Mapping Interfacial Energetics for Improving Charge Separation},
author = {Xiao, Chuanxiao and Zhao, Qian and Jiang, Chun-Sheng and Sun, Yinong and Al-Jassim, Mowafak M. and Nanayakkara, Sanjini and Luther, Joseph M.},
abstractNote = {Colloidal halide perovskite nanocrystals or quantum dots (QDs) show similar defect tolerance as thin film perovskite materials with added nanoscale phenomena. Perovskite QD solar cells have demonstrated efficiencies of 16.6%, greater than that of any other QD material system. While the efficiency lags behind the best thin-film perovskite devices, these solar cells could have advantages over the thin-film versions in terms of processability, phase stability, and high open-circuit voltages. However, some operating principles behind perovskite quantum dot device stacks and the associated electric field properties are still unknown. Here, we characterize the junction structure within perovskite QD solar cells, by exposing functioning cross-sections and using nanometer-scale Kelvin probe force microscopy to offer insight into the selection and performance of charge selective contacts. We also evaluated various solar cell device architectures with different selective contacts to isolate the role of each junction in device performance. We show that in high-performance n-i-p architectures, both electron- and hole-transport layer (HTL) interfaces possess a strong electric field, but in the case of the inverted p-i-n architecture, we find that high interfacial recombination at the HTL/QD junction is responsible for subpar device performance. Perovskite QD and thin film materials can synergistically be combined to offer more design flexibility in PV devices, and here we demonstrate that the interface between perovskite thin films and QDs are relatively benign and amenable for synergistic device design.},
doi = {10.1016/j.nanoen.2020.105319},
journal = {Nano Energy},
number = ,
volume = 78,
place = {United States},
year = {Fri Aug 28 00:00:00 EDT 2020},
month = {Fri Aug 28 00:00:00 EDT 2020}
}
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