Guanidinium Tetrafluoroborate
CAS Number 36595-00-3
Materials, Perovskite Interface Materials, Perovskite Materials
Ionic Material with Guanidinium Salt
High purity guanidinium pseudo-halide salt used as an additive for better electron extraction and stability in perovskite solar cells
Guanidinium tetrafluoroborate (GuaBF4), CAS number 36595-00-3, a functional ionic material, is a guanidinium pseudo-halide salt which is normally used as an additive in in wide-bandgap perovskite solar cells.
Improved PCE performance
PCE increases from 18.09% to 20.54%
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Enhanced Stability
Reduced hysteresis behaviour, increased moisture stability
Improved morphology of active layer
Smoother surface, higher crystallinity, efficiently passivated surface defects and optimized interfacial energy level alignment
With guanidinium tetrafluoroborate as the additive in the active layer materials, CH3NH3PbI3/PC61BM for surface treatment, the power conversion efficiency (PCE) of devices increases from 18.09% to 20.54% for small devices (active area 0.10 cm2) and from 12.35% to 15.52% for large devices (active area 1.0 cm2). It is believed that the GuaBF4 surface treatment not only promotes charge carrier transport and extraction between the CH3NH3PbI3/PC61BM interface, but also endows the CH3NH3PbI3 film with larger grains, smoother surface, higher crystallinity, efficiently passivated surface defects and optimized interfacial energy level alignment. Additionally, the surface treatment displays reduced hysteresis behaviour, increased moisture stability. The unencapsulated devices exhibit no performance degradation after storage in dry air for 1000 hours.
General Information
| CAS number | 36595-00-3 |
|---|---|
| Chemical formula | CH6BF4N3 |
| Molecular weight | 146.88 g/mol |
| Synonyms | GuaBF4 |
| Classification / Family | Guanidinium derivatives, Ionic materials, Solid additive, Perovskite solar cells. |
Product Details
| Purity | >99% |
|---|---|
| Melting point | n.a. |
| Appearance | White crystals/powder |
Chemical Structure
MSDS Documentation
Guanidinium Tetrafluoroborate MSDS Sheet
Literature and Reviews
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Oxidation-resistant all-perovskite tandem solar cells in substrate configuration. Nature Communi., Y. Wang et al., 14(1), 1819-1829 (2023); DOI: 10.1038/s41467-023-37492-y.
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Surface treatment enabled by functional guanidinium tetrafluoroborate achieving high-performance inverted perovskite solar cells, B. Huang et al., Sol. Energy Mater. Sol. Cells, 240, 11682 (2022); DOI: 10.1016/j.solmat.2022.111682.
- Synergistic effect of guanidinium tetrafluoroborate boosting photovoltaic performance of perovskite solar cells, Appl. Surf. Sci. 603, 154362 (2022); DOI: 10.1016/j.apsusc.2022.154362.