Guanidinium bromide (GDBr) and its derivatives are known to promote and enable stable 2D perovskite structures. This is done via i) the van der Waals interactions between guanidinium cations, and ii) hydrogen−halogen bonding between guanidinium cations and halide ions of different layers.
The presence of the guanidinium cation results in reduced defect density for the perovskite film and a longer carrier lifetime, due to a hydrogen-bonding effect produced by hydrogen from the guanidinium salt.
|Molecular weight||139.98 g/mol|
|Synonyms||Guanidine hydrobromide, Guanidine monohydrobromide, GDBr|
|Classification / Family||Guanidinium halides, Perovskite precursor materials, Perovskite solar cells, Perovskite LEDs|
Literature and Reviews
- Guanidinium: A Route to Enhanced Carrier Lifetime and Open-Circuit Voltage in Hybrid Perovskite Solar Cells, N. De Marco et al., Nano Lett., 16 (2), 1009–1016 (2016); DOI: 10.1021/acs.nanolett.5b04060.
- Guanidinium benefit, O. Graydon, Nat. Photonics 10, 145 (2016); doi:10.1038/nphoton.2016.35.
- Mixed Iodide–Bromide Methylammonium Lead Perovskite-based Diodes for Light Emission and Photovoltaics, L. Gil-Escrig et al., J. Phys. Chem. Lett., 6 (18), 3743–3748 (2015); DOI: 10.1021/acs.jpclett.5b01716.
Luminescent and Photoconductive Layered Lead Halide Perovskite Compounds Comprising Mixtures of Cesium and Guanidinium Cations, O. Nazarenko et al., Inorg. Chem., 56 (19), 11552–11564 (2017); DOI: 10.1021/acs.inorgchem.7b01204.
- Synthesis, Crystal Structures, Optical Properties, and Phase Transitions of the Layered Guanidinium-Based Hybrid Perovskites [C(NH2)3]2MI4; M = Sn, Pb, M. Daub et al., Eur. J. Inorg. Chem., 1120–1126 (2017); DOI: 10.1002/ejic.201601499.
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