Rapid Charge-Transfer Cascade through SWCNT Composites Enabling Low-Voltage Losses for Perovskite Solar Cells
- National Renewable Energy Lab., Golden, Colorado (United States). Chemistry and Nanoscience Center
- Princeton Univ., Princeton, NJ (United States). Dept. of Electrical Engineering; Princeton Univ., Princeton, NJ (United States). Princeton Research Inst. for the Science and Technology of Materials
- National Renewable Energy Lab., Golden, Colorado (United States). Chemistry and Nanoscience Center; Univ. of Colorado, Boulder, CO (United States). Renewable and Sustainable Energy Inst.
Good charge selective contacts are vital to achieving efficient perovskite solar cells. The selectivity of such a contact is determined by its energetic offset or alignment with the bands of the perovskite absorber and, most importantly, by its interfacial recombination losses. This study uses single-walled carbon nanotubes (SWCNTs) as a high-mobility hole extraction layer at the interface with a perovskite absorber. When employed as a charge-transfer cascade-like structure with a low-mobility hole-selective contact, this configuration can suppress the interfacial recombination through the rapid removal of holes from the interface region. Reducing these recombination losses in turn results in very low voltage losses of less than 340 mV in n-i-p perovskite solar cells.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Hybrid Organic-Inorganic Semiconductors for Energy (CHOISE); National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1562444
- Report Number(s):
- NREL/JA-5900-74228
- Journal Information:
- ACS Energy Letters, Vol. 4, Issue 8; ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Elucidating the Role of a Tetrafluoroborate‐Based Ionic Liquid at the n‐Type Oxide/Perovskite Interface
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journal | December 2019 |
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