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Guanidinium Tetrafluoroborate

CAS Number 36595-00-3

Materials, Perovskite Interface Materials, Perovskite Materials


Product Code M2422A1-5g
Price £150 ex. VAT

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


Overview | Specifications | MSDS | Literature and Reviews


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.

36595-00-3 improve performance of perovskite solar cell

Improved PCE performance

PCE increases from 18.09% to 20.54%

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Enhanced Guanidinium Tetrafluoroborate Stability

Enhanced Stability

Reduced hysteresis behaviour, increased moisture stability

Improved morphology of active layer 36595-00-3

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


guanidinium tetrafluoroborate - 36595-00-3 - GuaBF4
Guanidinium tetrafluoroborate (GuaBF4) chemical structure, 36595-00-3

MSDS Documentation


guanidinium tetrafluoroborate - 36595-00-3 - GuaBF4Guanidinium Tetrafluoroborate MSDS Sheet

Literature and Reviews


  1. 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.
  2. 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.
  3. 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.
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