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Mitigation of Vacuum and Illumination-Induced Degradation in Perovskite Solar Cells by Structure Engineering
- Source :
- Joule. 4:1087-1103
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- y High specific power, high stowed packing efficiency, low processing cost, and high tolerance against environmental threats (high energy and charged particle radiation) make perovskite solar cell (PSC) a promising candidate for power generation in space. However, vacuum, as encountered in space, causes perovskite outgassing, raising concern for its long-term stability. In this work, we find that PSCs (ITO/SnO2/perovskite/Spiro-MeOTAD/Au) degrade ten times faster upon reducing the pressure from 9 x 10(4) to 5 x 10(3) Pa during operation, due to acceleration of the perovskite transformation and ion migration. Gas permeability of the layers atop perovskite and mobile ion-induced chemical reactions at charge transporting layers and related interfaces are two critical factors. We develop a PSC structure (ITO/PTAA/perovskite/PCBM/ZnO/AZO/[Ni/Al grid]) that effectively mitigates vacuum and illumination-induced degradation pathways, enabling PSCs to realize a low PCE loss rate of 0.007%/h over 1,037 h at the maximum power point under 100 mW cm(-2) illumination at 5 x 10(3) Pa.
- Subjects :
- Materials science
Maximum power principle
design
Perovskite solar cell
02 engineering and technology
migration
010402 general chemistry
Atomic packing factor
01 natural sciences
law.invention
interfaces
law
Solar cell
formamidinium
Power density
Perovskite (structure)
tolerance
business.industry
temperature
stability
gold
021001 nanoscience & nanotechnology
Charged particle
0104 chemical sciences
Outgassing
General Energy
Optoelectronics
0210 nano-technology
business
Subjects
Details
- ISSN :
- 25424351
- Volume :
- 4
- Database :
- OpenAIRE
- Journal :
- Joule
- Accession number :
- edsair.doi.dedup.....b88c32835d71b08c1950026f14dc19b6